| disuse | (noun) the state of something that has been unused and neglected | Synonyms: neglect |
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| diverseness | (noun) noticeable heterogeneity | Synonyms: diversity, multifariousness, variety |
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| doghouse | (noun) outbuilding that serves as a shelter for a dog | Synonyms: dog house, kennel |
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| (noun) an idiomatic term for being in disfavor | - |
| dollhouse | (noun) a small model of a house used as a toy by children | Synonyms: doll's house |
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| (noun) a house so small that it is likened to a child's plaything | Synonyms: doll's house |
| doorcase | (noun) the frame that supports a door | Synonyms: doorframe |
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| dormouse | (noun) small furry-tailed squirrel-like Old World rodent that becomes torpid in cold weather | - |
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| dose | (noun) a measured portion of medicine taken at any one time | Synonyms: dosage |
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| (noun) street name for lysergic acid diethylamide | Synonyms: acid, back breaker, battery-acid, dot, Elvis, loony toons, Lucy in the sky with diamonds, pane, superman, window pane, Zen |
| (noun) the quantity of an active agent (substance or radiation) taken in or absorbed at any one time | Synonyms: dosage |
| (noun) a communicable infection transmitted by sexual intercourse or genital contact | Synonyms: Cupid's disease, Cupid's itch, sexually transmitted disease, social disease, STD, VD, venereal disease, venereal infection, Venus's curse |
| dosemeter | (noun) a measuring instrument for measuring doses of ionizing radiation (X-rays or radioactivity) | Synonyms: dosimeter |
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| dossel | (noun) an ornamental hanging of rich fabric hung behind the altar of a church or at the sides of a chancel | Synonyms: dossal |
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| dosser | (noun) someone who sleeps in any convenient place | Synonyms: street person |
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| dosshouse | (noun) a cheap lodging house | Synonyms: flophouse |
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| dowse | (noun) searching for underground water or minerals by using a dowsing rod | Synonyms: dowsing, rhabdomancy |
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| dowser | (noun) forked stick that is said to dip down to indicate underground water or oil | Synonyms: divining rod, dowsing rod, water finder, waterfinder |
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| (noun) someone who uses a divining rod to find underground water | Synonyms: rhabdomancer, water witch |
| drayhorse | (noun) draft horse kept for pulling carts | Synonyms: cart horse, carthorse |
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| dresser | (noun) furniture with drawers for keeping clothes | Synonyms: bureau, chest, chest of drawers |
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| (noun) a cabinet with shelves | - |
| (noun) low table with mirror or mirrors where one sits while dressing or applying makeup | Synonyms: dressing table, toilet table, vanity |
| (noun) a wardrobe assistant for an actor | Synonyms: actor's assistant |
| (noun) a person who dresses in a particular way | - |
| dropseed | (noun) a grass of the genus Sporobolus | Synonyms: drop-seed |
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| drowse | (noun) a light fitful sleep | Synonyms: doze |
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| drusen | (noun) (plural) an eye disease resulting from small accumulations of hyaline bodies underneath the retina | - |
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| dulse | (noun) coarse edible red seaweed | Synonyms: Rhodymenia palmata |
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| dysentery | (noun) an infection of the intestines marked by severe diarrhea | - |
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| ease | (noun) freedom from activity (work or strain or responsibility) | Synonyms: relaxation, repose, rest |
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| (noun) freedom from difficulty or hardship or effort | Synonyms: easiness, simpleness, simplicity |
| (noun) freedom from constraint or embarrassment | Synonyms: informality |
| (noun) a freedom from financial difficulty that promotes a comfortable state | Synonyms: comfort |
| (noun) the condition of being comfortable or relieved (especially after being relieved of distress) | Synonyms: relief |
| easel | (noun) an upright tripod for displaying something (usually an artist's canvas) | - |
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| easement | (noun) the act of reducing something unpleasant (as pain or annoyance) | Synonyms: alleviation, easing, relief |
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| (noun) (law) the privilege of using something that is not your own (as using another's land as a right of way to your own land) | - |
| eclipse | (noun) one celestial body obscures another | Synonyms: occultation |
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| economiser | (noun) a frugal person who limits spending and avoids waste | Synonyms: economizer |
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| ecrevisse | (noun) small crayfish of Europe and Asia and western North America | Synonyms: Old World crayfish |
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| (noun) tiny lobster-like crustaceans usually boiled briefly | Synonyms: crawdad, crawfish, crayfish |
| eisegesis | (noun) personal interpretation of a text (especially of the Bible) using your own ideas | - |
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| elastase | (noun) a pancreatic enzyme that catalyzes the hydrolysis of elastin | - |
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| ellipse | (noun) a closed plane curve resulting from the intersection of a circular cone and a plane cutting completely through it | Synonyms: oval |
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| emphysema | (noun) an abnormal condition of the lungs marked by decreased respiratory function; associated with smoking or chronic bronchitis or old age | Synonyms: pulmonary emphysema |
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| encasement | (noun) the act of enclosing something in a case | Synonyms: incasement |
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| endonuclease | (noun) a nuclease that cleaves nucleic acids at interior bonds and so produces fragments of various sizes | - |
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| endorsement | (noun) the act of endorsing | Synonyms: indorsement |
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| (noun) formal and explicit approval | Synonyms: countenance, imprimatur, indorsement, sanction, warrant |
| (noun) a promotional statement (as found on the dust jackets of books) | Synonyms: blurb, indorsement |
| (noun) a speech seconding a motion | Synonyms: indorsement, second, secondment |
| (noun) a signature that validates something | Synonyms: indorsement |
| endorser | (noun) someone who expresses strong approval | Synonyms: indorser, ratifier, subscriber |
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| (noun) a person who transfers his ownership interest in something by signing a check or negotiable security | Synonyms: indorser |
| energiser | (noun) a device that supplies electrical energy | Synonyms: energizer |
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| (noun) someone who imparts energy and vitality and spirit to other people | Synonyms: animator, energizer, vitaliser, vitalizer |
| enfranchisement | (noun) the act of certifying or bestowing a franchise on | Synonyms: certification |
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| (noun) a statutory right or privilege granted to a person or group by a government (especially the rights of citizenship and the right to vote) | Synonyms: franchise |
| (noun) freedom from political subjugation or servitude | - |
| ensemble | (noun) a coordinated outfit (set of clothing) | - |
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| (noun) the chorus of a ballet company | Synonyms: corps de ballet |
| (noun) a group of musicians playing or singing together | - |
| (noun) an assemblage of parts or details (as in a work of art) considered as forming a whole | Synonyms: tout ensemble |
| (noun) a cast other than the principals | Synonyms: supporting players |
| enterokinase | (noun) enzyme in the intestinal juice that converts inactive trypsinogen into active trypsin | - |
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| enterprise | (noun) a purposeful or industrious undertaking (especially one that requires effort or boldness) | Synonyms: endeavor, endeavour |
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| (noun) readiness to embark on bold new ventures | Synonyms: enterprisingness, go-ahead, initiative |
| (noun) an organization created for business ventures | - |
| enterpriser | (noun) someone who organizes a business venture and assumes the risk for it | Synonyms: entrepreneur |
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| equaliser | (noun) a weight that balances another weight | Synonyms: balance, counterbalance, counterpoise, counterweight, equalizer |
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| (noun) electronic equipment that reduces frequency distortion | Synonyms: equalizer |
| equipoise | (noun) equality of distribution | Synonyms: balance, counterbalance, equilibrium |
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| eraser | (noun) an implement used to erase something | - |
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| essence | (noun) a toiletry that emits and diffuses a fragrant odor | Synonyms: perfume |
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| (noun) the choicest or most essential or most vital part of some idea or experience | Synonyms: center, centre, core, gist, heart, heart and soul, inwardness, kernel, marrow, meat, nitty-gritty, nub, pith, substance, sum |
| (noun) the central meaning or theme of a speech or literary work | Synonyms: burden, core, effect, gist |
| (noun) any substance possessing to a high degree the predominant properties of a plant or drug or other natural product from which it is extracted | - |
| essential | (noun) anything indispensable | Synonyms: necessary, necessity, requirement, requisite |
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| essentiality | (noun) basic importance | Synonyms: essentialness |
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| essentialness | (noun) basic importance | Synonyms: essentiality |
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| excise | (noun) a tax that is measured by the amount of business done (not on property or income from real estate) | Synonyms: excise tax |
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| exciseman | (noun) someone who collects taxes for the government | Synonyms: collector of internal revenue, internal revenue agent, tax collector, taxman |
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| excuse | (noun) a poor example | Synonyms: apology |
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| (noun) a defense of some offensive behavior or some failure to keep a promise etc. | Synonyms: alibi, exculpation, self-justification |
| (noun) a note explaining an absence | - |
| excuser | (noun) a person who pardons or forgives or excuses a fault or offense | Synonyms: forgiver, pardoner |
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| exercise | (noun) the activity of exerting your muscles in various ways to keep fit | Synonyms: exercising, physical exercise, physical exertion, workout |
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| (noun) a task performed or problem solved in order to develop skill or understanding | Synonyms: example |
| (noun) systematic training by multiple repetitions | Synonyms: drill, practice, practice session, recitation |
| (noun) the act of using | Synonyms: employment, usage, use, utilisation, utilization |
| (noun) an action, often used negatively and without consequences | - |
| (noun) (usually plural) a ceremony that involves processions and speeches | - |
| exerciser | (noun) sports equipment used in gymnastic exercises | Synonyms: gymnastic apparatus |
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| exonuclease | (noun) a nuclease that releases one nucleotide at a time (serially) beginning at one of a nucleic acid | - |
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| exorciser | (noun) someone who practices exorcism | Synonyms: exorcist |
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| expanse | (noun) the extent of a 2-dimensional surface enclosed within a boundary | Synonyms: area, surface area |
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| (noun) a wide scope | Synonyms: sweep |
| (noun) a wide and open space or area as of surface or land or sky | - |
| expense | (noun) a detriment or sacrifice | - |
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| (noun) amounts paid for goods and services that may be currently tax deductible (as opposed to capital expenditures) | Synonyms: disbursal, disbursement |
| (noun) money spent to perform work and usually reimbursed by an employer | - |
| expertise | (noun) skillfulness by virtue of possessing special knowledge | Synonyms: expertness |
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| expose | (noun) the exposure of an impostor or a fraud | Synonyms: unmasking |
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| eyeglasses | (noun) (plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision | Synonyms: glasses, specs, spectacles |
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| falsehood | (noun) the act of rendering something false as by fraudulent changes (of documents or measures etc.) or counterfeiting | Synonyms: falsification |
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| (noun) a false statement | Synonyms: falsity, untruth |
| falseness | (noun) the quality of not being open or truthful; deceitful or hypocritical | Synonyms: hollowness, insincerity |
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| (noun) unfaithfulness by virtue of being unreliable or treacherous | Synonyms: faithlessness, fickleness, inconstancy |
| (noun) the state of being false or untrue | Synonyms: falsity |
| falsetto | (noun) a male singing voice with artificially high tones in an upper register | - |
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| fanbase | (noun) All of the fans or devotees of something | - |
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| farmhouse | (noun) house for a farmer and family | - |
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| femtosecond | (noun) one quadrillionth (10^-15) of a second; one thousandth of a picosecond | - |
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| fertiliser | (noun) any substance such as manure or a mixture of nitrates used to make soil more fertile | Synonyms: fertilizer, plant food |
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| fesse | (noun) (heraldry) an ordinary consisting of a broad horizontal band across a shield | Synonyms: fess |
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| fibrinase | (noun) in the clotting of blood thrombin catalyzes factor XIII into its active form (fibrinase) which causes fibrin to form a stable clot | Synonyms: factor XIII |
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| fieldmouse | (noun) any nocturnal Old World mouse of the genus Apodemus inhabiting woods and fields and gardens | Synonyms: field mouse |
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| filoselle | (noun) a soft silk embroidery thread. | - |
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| finesse | (noun) subtly skillful handling of a situation | Synonyms: delicacy, diplomacy, discreetness |
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| firebase | (noun) an artillery base to support advancing troops | - |
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| firehouse | (noun) a station housing fire apparatus and firemen | Synonyms: fire station |
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| flaxseed | (noun) the seed of flax used as a source of oil | Synonyms: linseed |
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| flophouse | (noun) a cheap lodging house | Synonyms: dosshouse |
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| fosse | (noun) ditch dug as a fortification and usually filled with water | Synonyms: moat |
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| fraise | (noun) sloping or horizontal rampart of pointed stakes | - |
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| (noun) a ruff for the neck worn in the 16th century | - |
| framboise | (noun) the common European raspberry; fruit red or orange | Synonyms: European raspberry, Rubus idaeus, wild raspberry |
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| franchise | (noun) a statutory right or privilege granted to a person or group by a government (especially the rights of citizenship and the right to vote) | Synonyms: enfranchisement |
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| (noun) an authorization to sell a company's goods or services in a particular place | - |
| (noun) a business established or operated under an authorization to sell or distribute a company's goods or services in a particular area | Synonyms: dealership |
| frankincense | (noun) an aromatic gum resin obtained from various Arabian or East African trees; formerly valued for worship and for embalming and fumigation | Synonyms: gum olibanum, olibanum, thus |
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| fricassee | (noun) pieces of chicken or other meat stewed in gravy with e.g. carrots and onions and served with noodles or dumplings | - |
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| fructose | (noun) a simple sugar found in honey and in many ripe fruits | Synonyms: fruit sugar, laevulose, levulose |
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| fundraiser | (noun) a social function that is held for the purpose of raising money | - |
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| (noun) someone who solicits financial contributions | - |
| furosemide | (noun) commonly used diuretic (trade name Lasix) used to treat hypertension and edema | Synonyms: Lasix |
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| fuse | (noun) any igniter that is used to initiate the burning of a propellant | Synonyms: fusee, fuze, fuzee, primer, priming |
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| (noun) an electrical device that can interrupt the flow of electrical current when it is overloaded | Synonyms: electrical fuse, safety fuse |
| fusee | (noun) any igniter that is used to initiate the burning of a propellant | Synonyms: fuse, fuze, fuzee, primer, priming |
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| (noun) a friction match with a large head that will stay alight in the wind | Synonyms: fuzee |
| (noun) a colored flare used as a warning signal by trucks and trains | Synonyms: fuzee |
| (noun) a spirally grooved spindle in a clock that counteracts the diminishing power of the uncoiling mainspring | Synonyms: fusee drive |
| fuselage | (noun) the central body of an airplane that is designed to accommodate the crew and passengers (or cargo) | - |
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| galactose | (noun) a simple sugar found in lactose | Synonyms: brain sugar |
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| galactosemia | (noun) a genetic disease (autosomal recessive) in which an enzyme needed to metabolize galactose is deficient or absent; typically develops shortly after birth | - |
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| galvaniser | (noun) a leader who stimulates and excites people to action | Synonyms: galvanizer, inspirer |
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| (noun) a skilled worker who coats iron or steel with zinc | Synonyms: galvanizer |
| gaseousness | (noun) having the consistency of a gas | - |
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| gatehouse | (noun) a house built at a gateway; usually the gatekeeper's residence | - |
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| gearset | (noun) a set of gears | - |
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| genlisea | (noun) rootless carnivorous swamp plants having at the base of the stem a rosette of foliage and leaves consisting of slender tubes swollen in the middle to form traps; each tube passes into two long spirally twisted arms with stiff hairs | - |
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| genoise | (noun) rich and delicate Italian sponge cake | - |
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| geyser | (noun) a spring that discharges hot water and steam | - |
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| gifset | (noun) A set of images in the GIF format | - |
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| ginseng | (noun) Chinese herb with palmately compound leaves and small greenish flowers and forked aromatic roots believed to have medicinal powers | Synonyms: nin-sin, Panax ginseng, Panax pseudoginseng, Panax schinseng |
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| (noun) aromatic root of ginseng plants | - |
| glasses | (noun) (plural) optical instrument consisting of a frame that holds a pair of lenses for correcting defective vision | Synonyms: eyeglasses, specs, spectacles |
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