| laughter | (noun) the activity of laughing; the manifestation of joy or mirth or scorn | - |
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| (noun) the sound of laughing | Synonyms: laugh |
| light | (adjective) of comparatively little physical weight or density | - |
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| (adjective) psychologically light; especially free from sadness or troubles | - |
| (adjective) not great in degree or quantity or number | - |
| (adjective) of the military or industry; using (or being) relatively small or light arms or equipment | - |
| (adjective) (used of color) having a relatively small amount of coloring agent | Synonyms: light-colored |
| (adjective) characterized by or emitting light | - |
| (adjective) (physics, chemistry) not having atomic weight greater than average | - |
| (adjective) of little intensity or power or force | - |
| (adjective) easily assimilated in the alimentary canal; not rich or heavily seasoned | - |
| (adjective) silly or trivial | Synonyms: idle |
| (adjective) weak and likely to lose consciousness | Synonyms: faint, light-headed, lightheaded, swooning |
| (adjective) having little importance | - |
| (adjective) less than the correct or legal or full amount often deliberately so | Synonyms: scant, short |
| (adjective) designed for ease of movement or to carry little weight | - |
| (adjective) moving easily and quickly; nimble | Synonyms: lightsome, tripping |
| (adjective) (used of soil) loose and large-grained in consistency | - |
| (adjective) having relatively few calories | Synonyms: calorie-free, lite, low-cal |
| (adjective) (of sound or color) free from anything that dulls or dims | Synonyms: clean, clear, unclouded |
| (adjective) (of sleep) easily disturbed | Synonyms: wakeful |
| (adjective) marked by temperance in indulgence | Synonyms: abstemious |
| (adjective) very thin and insubstantial | - |
| (adjective) casual and unrestrained in sexual behavior | Synonyms: easy, loose, promiscuous, sluttish, wanton |
| (adjective) demanding little effort; not burdensome | - |
| (adjective) (used of vowels or syllables) pronounced with little or no stress | Synonyms: unaccented, weak |
| (adjective) intended primarily as entertainment; not serious or profound | - |
| (noun) any device serving as a source of illumination | Synonyms: light source |
| (noun) a device for lighting or igniting fuel or charges or fires | Synonyms: igniter, ignitor, lighter |
| (noun) the visual effect of illumination on objects or scenes as created in pictures | Synonyms: lightness |
| (noun) the quality of being luminous; emitting or reflecting light | Synonyms: brightness, brightness level, luminance, luminosity, luminousness |
| (noun) merriment expressed by a brightness or gleam or animation of countenance | Synonyms: spark, sparkle, twinkle |
| (noun) mental understanding as an enlightening experience | - |
| (noun) a particular perspective or aspect of a situation | - |
| (noun) public awareness | - |
| (noun) a visual warning signal | - |
| (noun) an illuminated area | - |
| (noun) a person regarded very fondly | - |
| (noun) (physics) electromagnetic radiation that can produce a visual sensation | Synonyms: visible light, visible radiation |
| (noun) having abundant light or illumination | Synonyms: lighting |
| (noun) a condition of spiritual awareness; divine illumination | Synonyms: illumination |
| (adverb) with few burdens | Synonyms: lightly |
| (verb) introduce light into | Synonyms: illume, illuminate, illumine, light up |
| (verb) start or maintain a fire in | Synonyms: fire, ignite |
| (verb) begin to smoke | Synonyms: fire up, light up |
| (verb) to come to rest, settle | Synonyms: alight, perch |
| (verb) alight from (a horse) | Synonyms: dismount, get down, get off, unhorse |
| (verb) fall to somebody by assignment or lot; passed | Synonyms: fall |
| (verb) cause to start burning; subject to fire or great heat | Synonyms: ignite |
| lightbulb | (noun) electric lamp consisting of a transparent or translucent glass housing containing a wire filament (usually tungsten) that emits light when heated by electricity | Synonyms: bulb, electric-light bulb, electric light, incandescent lamp, light bulb |
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| lighted | (adjective) set afire or burning | Synonyms: lit |
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| (adjective) provided with artificial light | Synonyms: illuminated, lit, well-lighted |
| lighten | (verb) make more cheerful through the use of color | Synonyms: brighten, lighten up |
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| (verb) become lighter | Synonyms: lighten up |
| (verb) alleviate or remove (pressure or stress) or make less oppressive | Synonyms: relieve |
| (verb) become more cheerful | Synonyms: buoy up, lighten up |
| (verb) reduce the weight on; make lighter | - |
| (verb) make more cheerful | Synonyms: buoy up, lighten up |
| lightener | (noun) any type of lightening agent that can be used to brighten the appearance of hair, skin, wood and other surfaces. | - |
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| lightening | (noun) changing to a lighter color | Synonyms: whitening |
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| (noun) descent of the uterus into the pelvic cavity that occurs late in pregnancy; the fetus is said to have dropped | - |
| lighter | (noun) a device for lighting or igniting fuel or charges or fires | Synonyms: igniter, ignitor, light |
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| (noun) a flatbottom boat for carrying heavy loads (especially on canals) | Synonyms: barge, flatboat, hoy |
| (noun) a substance used to ignite or kindle a fire | Synonyms: igniter, ignitor |
| (verb) transport in a flatbottom boat | - |
| lighterage | (noun) the transportation of goods on a lighter | - |
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| (noun) the fee charged for carrying goods in lighters | - |
| lighterman | (noun) someone who operates a barge | Synonyms: bargee, bargeman |
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| lightheaded | (adjective) lacking seriousness; given to frivolity | Synonyms: airheaded, dizzy, empty-headed, featherbrained, giddy, light-headed, silly |
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| (adjective) weak and likely to lose consciousness | Synonyms: faint, light-headed, light, swooning |
| lightheadedness | (noun) a frivolous lack of prudence | - |
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| (noun) a reeling sensation; a feeling that you are about to fall | Synonyms: dizziness, giddiness, vertigo |
| lighthearted | (adjective) carefree and happy and lighthearted | Synonyms: blithe, blithesome, light-hearted, lightsome |
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| lightheartedness | (noun) the cheerful feeling you have when nothing is troubling you | Synonyms: carefreeness, insouciance, lightsomeness |
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| lighthouse | (noun) a tower with a light that gives warning of shoals to passing ships | Synonyms: beacon, beacon light, pharos |
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| lighting | (noun) the act of setting something on fire | Synonyms: firing, ignition, inflammation, kindling |
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| (noun) the craft of providing artificial light | - |
| (noun) apparatus for supplying artificial light effects for the stage or a film | - |
| (noun) having abundant light or illumination | Synonyms: light |
| lightless | (adjective) without illumination | Synonyms: unilluminated, unlighted, unlit |
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| (adjective) giving no light | - |
| lightlessness | (noun) total absence of light | Synonyms: black, blackness, pitch blackness, total darkness |
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| lightly | (adverb) with little weight or force | Synonyms: gently, softly |
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| (adverb) indulging with temperance | - |
| (adverb) with few burdens | Synonyms: light |
| (adverb) in a small quantity or extent | Synonyms: thinly |
| (adverb) with indifference or without dejection | - |
| (adverb) to a slight degree | - |
| (adverb) without good reason | - |
| lightness | (noun) the trait of being lighthearted and frivolous | Synonyms: lightsomeness |
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| (noun) the visual effect of illumination on objects or scenes as created in pictures | Synonyms: light |
| (noun) the property of being comparatively small in weight | Synonyms: weightlessness |
| (noun) having a light color | - |
| (noun) the gracefulness of a person or animal that is quick and nimble | Synonyms: agility, legerity, lightsomeness, nimbleness |
| (noun) a feeling of joy and pride | Synonyms: elation, high spirits |
| lightning | (noun) the flash of light that accompanies an electric discharge in the atmosphere (or something resembling such a flash); can scintillate for a second or more | - |
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| (noun) abrupt electric discharge from cloud to cloud or from cloud to earth accompanied by the emission of light | - |
| lightproof | (adjective) not penetrable by light | Synonyms: light-tight |
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| lightship | (noun) a ship equipped like a lighthouse and anchored where a permanent lighthouse would be impracticable | - |
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| lightsome | (adjective) carefree and happy and lighthearted | Synonyms: blithe, blithesome, light-hearted, lighthearted |
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| (adjective) moving easily and quickly; nimble | Synonyms: light, tripping |
| lightsomely | (adverb) in a light-hearted manner | Synonyms: light-heartedly |
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| (adverb) moving with quick light steps | Synonyms: trippingly |
| lightsomeness | (noun) the trait of being lighthearted and frivolous | Synonyms: lightness |
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| (noun) the gracefulness of a person or animal that is quick and nimble | Synonyms: agility, legerity, lightness, nimbleness |
| (noun) the cheerful feeling you have when nothing is troubling you | Synonyms: carefreeness, insouciance, lightheartedness |
| lightstick | (noun) A portable rod used for illumination. | - |
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| lightweight | (adjective) weighing relatively little compared with another item or object of similar use | - |
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| (adjective) having no importance or influence | - |
| (noun) A weight class division in combat sports, for fighters heavier than those in the featherweight division and lighter than those in the welterweight division. | - |
| (noun) a professional boxer who weighs between 131 and 135 pounds | - |
| (noun) a wrestler who weighs 139-154 pounds | - |
| (noun) someone who is unimportant but cheeky and presumptuous | Synonyms: jackanapes, whippersnapper |
| (noun) an amateur boxer who weighs no more than 132 pounds | - |
| lightwood | (noun) tall Australian acacia yielding highly valued black timber | Synonyms: Acacia melanoxylon |
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| limelight | (noun) a lamp consisting of a flame directed at a cylinder of lime with a lens to concentrate the light; formerly used for stage lighting | Synonyms: calcium light |
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| (noun) a focus of public attention | Synonyms: glare, public eye, spotlight |
| longsighted | (adjective) capable of seeing to a great distance | Synonyms: eagle-eyed, farseeing, keen-sighted |
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| (adjective) planning prudently for the future | Synonyms: farseeing, farsighted, foresighted, foresightful, long, prospicient |
| longsightedness | (noun) abnormal condition in which vision for distant objects is better than for near objects | Synonyms: farsightedness, hypermetropia, hypermetropy, hyperopia |
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| lunchtime | (noun) the customary or habitual hour for eating lunch | Synonyms: lunch period |
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| makeweight | (noun) a weight added to the scale to reach a required weight | - |
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| (noun) anything added to fill out a whole | Synonyms: filler |
| manslaughter | (noun) homicide without malice aforethought | - |
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| middleweight | (noun) a professional boxer who weighs between 155 and 160 pounds | - |
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| (noun) a wrestler who weighs 172-192 pounds | - |
| (noun) an amateur boxer who weighs no more than 165 pounds | - |
| midnight | (noun) 12 o'clock at night; the middle of the night | - |
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| might | (noun) physical strength | Synonyms: mightiness, power |
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| mightily | (adverb) (Southern regional intensive) very; to a great degree | Synonyms: mighty, powerful, right |
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| (adverb) powerfully or vigorously | - |
| mightiness | (noun) physical strength | Synonyms: might, power |
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| mighty | (adjective) having or showing great strength or force or intensity | - |
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| (adverb) (Southern regional intensive) very; to a great degree | Synonyms: mightily, powerful, right |
| millwright | (noun) a workman who designs or erects mills and milling machinery | - |
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| moonlight | (noun) the light of the Moon | Synonyms: Moon, moonshine |
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| (verb) work a second job, usually after hours | - |
| moonlighter | (noun) a person who holds a second job (usually after hours) | - |
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| mornight | (noun) both morning and night, used when greeting someone | - |
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| nanophthalmos | (noun) condition in which both eyes are abnormally small but otherwise normal | - |
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| naphtha | (noun) any of various volatile flammable liquid hydrocarbon mixtures; used chiefly as solvents | - |
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| naphthalene | (noun) a white crystalline strong-smelling hydrocarbon made from coal tar or petroleum and used in organic synthesis and as a fumigant in mothballs | - |
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| naphthol | (noun) either of two phenols derived from naphthalene | - |
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| naphthoquinone | (noun) a fat-soluble vitamin that helps in the clotting of blood | Synonyms: antihemorrhagic factor, vitamin K |
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| naught | (noun) complete failure | - |
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| (noun) a quantity of no importance; thing (object:), singular, negative pronoun; pronoun, thing, singular; quantifier: negative existential | Synonyms: aught, cipher, cypher, goose egg, nada, nil, nix, nothing, null, zero, zilch, zip, zippo |
| naughtily | (adverb) in a disobedient or naughty way | Synonyms: badly, mischievously |
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| naughtiness | (noun) an attribute of mischievous children | Synonyms: badness, mischievousness |
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| naughty | (adjective) badly behaved | - |
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| (adjective) suggestive of sexual impropriety | Synonyms: blue, gamey, gamy, juicy, racy, risque, spicy |
| nearsighted | (adjective) unable to see distant objects clearly | Synonyms: myopic, shortsighted |
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| nearsightedness | (noun) (ophthalmology) eyesight abnormality resulting from the eye's faulty refractive ability; distant objects appear blurred | Synonyms: myopia, shortsightedness |
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| nephthytis | (noun) any plant of the genus Nephthytis | - |
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| night | (noun) darkness | - |
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| (noun) the time after sunset and before sunrise while it is dark outside | Synonyms: dark, nighttime |
| (noun) a period of ignorance or backwardness or gloom | - |
| (noun) the dark part of the diurnal cycle considered a time unit | - |
| (noun) the time between sunset and midnight | - |
| (noun) the period spent sleeping | - |
| (noun) a shortening of nightfall | - |
| nightbird | (noun) a person who likes to be active late at night | Synonyms: night owl, nighthawk |
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| nightcap | (noun) the final game of a double header | - |
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| (noun) a cloth cap worn in bed | - |
| (noun) an alcoholic drink taken at bedtime; often alcoholic | - |
| nightclothes | (noun) garments designed to be worn in bed | Synonyms: nightwear, sleepwear |
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| nightclub | (noun) a spot that is open late at night and that provides entertainment (as singers or dancers) as well as dancing and food and drink | Synonyms: cabaret, club, night club, nightspot |
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| nightcrawler | (noun) terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers | Synonyms: angleworm, crawler, dew worm, earthworm, fishing worm, fishworm, nightwalker, red worm, wiggler |
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| nightdress | (noun) lingerie consisting of a loose dress designed to be worn in bed by women | Synonyms: gown, night-robe, nightgown, nightie |
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| nighted | (adjective) overtaken by night or darkness | Synonyms: benighted |
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| nightfall | (noun) the time of day immediately following sunset | Synonyms: crepuscle, crepuscule, dusk, evenfall, fall, gloam, gloaming, twilight |
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| nightgown | (noun) lingerie consisting of a loose dress designed to be worn in bed by women | Synonyms: gown, night-robe, nightdress, nightie |
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| nighthawk | (noun) mainly nocturnal North American goatsucker | Synonyms: bullbat, mosquito hawk |
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| (noun) a person who likes to be active late at night | Synonyms: night owl, nightbird |
| nightie | (noun) lingerie consisting of a loose dress designed to be worn in bed by women | Synonyms: gown, night-robe, nightdress, nightgown |
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| nightingale | (noun) European songbird noted for its melodious nocturnal song | Synonyms: Luscinia megarhynchos |
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| nightjar | (noun) mainly crepuscular or nocturnal nonpasserine birds with mottled greyish-brown plumage and large eyes; feed on insects | Synonyms: caprimulgid, goatsucker |
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| nightlife | (noun) the activity of people seeking nighttime diversion (as at the theater, a nightclub, etc.) | Synonyms: night life |
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| (noun) the entertainment available to people seeking nighttime diversion | Synonyms: night life |
| nightlong | (adjective) lasting, open, or operating through the whole night | Synonyms: all-night, overnight |
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| nightly | (adjective) happening every night | - |
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| (adverb) at the end of each day | Synonyms: every night |
| nightmare | (noun) a terrifying or deeply upsetting dream | - |
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| (noun) a situation resembling a terrifying dream | Synonyms: incubus |
| nightmarish | (adjective) extremely alarming | Synonyms: bloodcurdling, hair-raising |
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| nightmarishness | (noun) The property of being extremely bad, miserable, difficult or terrifying; resembling a nightmare. | Synonyms: hellishness |
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| nightrider | (noun) member of a secret mounted band in United States South after the American Civil War; committed acts of intimidation and revenge | Synonyms: night rider |
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| nightshade | (noun) any of numerous shrubs or herbs or vines of the genus Solanum; most are poisonous though many bear edible fruit | - |
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| nightshirt | (noun) nightclothes worn by men | - |
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| nightspot | (noun) a spot that is open late at night and that provides entertainment (as singers or dancers) as well as dancing and food and drink | Synonyms: cabaret, club, night club, nightclub |
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| nightstick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, billystick, truncheon |
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| nighttime | (noun) the time after sunset and before sunrise while it is dark outside | Synonyms: dark, night |
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| nightwalker | (noun) terrestrial worm that burrows into and helps aerate soil; often surfaces when the ground is cool or wet; used as bait by anglers | Synonyms: angleworm, crawler, dew worm, earthworm, fishing worm, fishworm, nightcrawler, red worm, wiggler |
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| nightwear | (noun) garments designed to be worn in bed | Synonyms: nightclothes, sleepwear |
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| nightwork | (noun) work to be done at night | - |
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| nought | (noun) a mathematical element that when added to another number yields the same number | Synonyms: 0, cipher, cypher, zero |
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| onslaught | (noun) (military) an offensive against an enemy (using weapons) | Synonyms: attack, onrush, onset |
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| (noun) the rapid and continuous delivery of linguistic communication (spoken or written) | Synonyms: barrage, bombardment, outpouring |
| (noun) a sudden and severe onset of trouble | - |
| ophthalmectomy | (noun) surgical removal of an eye | - |
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| ophthalmia | (noun) severe conjunctivitis | Synonyms: ophthalmitis |
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| ophthalmic | (adjective) of or relating to ophthalmology | - |
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| (adjective) of or relating to or resembling the eye | Synonyms: ocular, optic, optical |
| ophthalmitis | (noun) severe conjunctivitis | Synonyms: ophthalmia |
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| ophthalmologist | (noun) a medical doctor specializing in the diagnosis and treatment of diseases of the eye | Synonyms: eye doctor, oculist |
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| ophthalmology | (noun) the branch of medicine concerned with the eye and its diseases | - |
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| ophthalmoplegia | (noun) paralysis of the motor nerves of the eye | - |
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| ophthalmoscope | (noun) medical instrument for examining the retina of the eye | - |
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| ophthalmoscopy | (noun) examination of the interior of an eye using an ophthalmoscope | - |
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| outfight | (verb) to fight better than; get the better of | - |
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| outright | (adjective) without reservation or exception | Synonyms: straight-out, unlimited |
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| (adverb) without reservation or concealment | - |
| (adverb) without restrictions or stipulations or further payments | - |
| (adverb) without any delay | Synonyms: in a flash, instantaneously, instantly |
| (adverb) thoroughgoing | Synonyms: downright |
| overflight | (noun) a flight by an aircraft over a particular area (especially over an area in foreign territory) | - |
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