| nard | (noun) an aromatic ointment used in antiquity | Synonyms: spikenard |
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| nationhood | (noun) the state of being a nation | - |
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| neckband | (noun) a band that fits around the neck and is usually folded over | Synonyms: collar |
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| (noun) necklace that fits tightly around a woman's neck | Synonyms: choker, collar, dog collar |
| (noun) a band around the collar of a garment | - |
| need | (noun) the psychological feature that arouses an organism to action toward a desired goal; the reason for the action; that which gives purpose and direction to behavior | Synonyms: motivation, motive |
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| (noun) anything that is necessary but lacking | Synonyms: want |
| (noun) a condition requiring relief | Synonyms: demand |
| (noun) a state of extreme poverty or destitution | Synonyms: indigence, pauperism, pauperization, penury |
| needlewood | (noun) large bushy shrub with pungent pointed leaves and creamy white flowers; central and eastern Australia | Synonyms: Hakea leucoptera, needle-wood, needle wood |
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| neighborhood | (noun) people living near one another | Synonyms: neighbourhood |
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| (noun) a surrounding or nearby region | Synonyms: locality, neck of the woods, neighbourhood, vicinity |
| (noun) an area within a city or town that has some distinctive features (especially one forming a community) | - |
| (noun) the approximate amount of something (usually used prepositionally as in `in the region of') | Synonyms: region |
| neighbourhood | (noun) people living near one another | Synonyms: neighborhood |
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| (noun) a surrounding or nearby region | Synonyms: locality, neck of the woods, neighborhood, vicinity |
| nerd | (noun) an insignificant student who is ridiculed as being affected or boringly studious | Synonyms: dweeb, grind, swot, wonk |
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| (noun) an intelligent but single-minded expert in a particular technical field or profession | - |
| neritid | (noun) operculate seasnail of coastal waters with a short spiral shell | Synonyms: neritid gastropod |
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| netherworld | (noun) (religion) the world of the dead | Synonyms: Hades, Hell, infernal region, Scheol, underworld |
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| newlywed | (noun) someone recently married | Synonyms: honeymooner |
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| newsstand | (noun) a stall where newspapers and other periodicals are sold | - |
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| nicad | (noun) a rechargeable battery with a nickel cathode and a cadmium anode; often used in emergency systems because of its low discharge rate when not in use | Synonyms: nickel-cadmium accumulator |
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| niggard | (noun) a selfish person who is unwilling to give or spend | Synonyms: churl, scrooge, skinflint |
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| nightbird | (noun) a person who likes to be active late at night | Synonyms: night owl, nighthawk |
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| nitweed | (noun) annual wiry-stemmed North American weed with minute scalelike leaves and small yellow flowers | Synonyms: Hypericum gentianoides, orange grass, pine-weed, pineweed |
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| noctuid | (noun) usually dull-colored medium-sized nocturnal moth; the usually smooth-bodied larvae are destructive agricultural pests | Synonyms: noctuid moth, owlet moth |
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| nod | (noun) the act of nodding the head | - |
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| (noun) a sign of assent or salutation or command | - |
| nomad | (noun) a member of a people who have no permanent home but move about according to the seasons | - |
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| nonsteroid | (noun) an organic compound that does no contain a steroid | Synonyms: nonsteroidal |
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| northeastward | (noun) the compass point midway between north and east; at 45 degrees | Synonyms: NE, nor'-east, northeast |
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| northland | (noun) any region lying in or toward the north | - |
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| northward | (noun) the cardinal compass point that is at 0 or 360 degrees | Synonyms: due north, N, north |
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| northwestward | (noun) the compass point midway between north and west; at 315 degrees | Synonyms: nor'-west, northwest, NW |
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| noseband | (noun) a strap that is the part of a bridle that goes over the animal's nose | Synonyms: nosepiece |
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| nosebleed | (noun) bleeding from the nose | Synonyms: epistaxis |
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| notepad | (noun) a pad of paper for keeping notes | - |
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| notochord | (noun) a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates | - |
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| nursemaid | (noun) a woman who is the custodian of children | Synonyms: nanny, nurse |
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| nymphalid | (noun) medium to large butterflies found worldwide typically having brightly colored wings and much-reduced nonfunctional forelegs carried folded on the breast | Synonyms: brush-footed butterfly, four-footed butterfly, nymphalid butterfly |
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| octad | (noun) the cardinal number that is the sum of seven and one | Synonyms: 8, eight, eighter, eighter from Decatur, octet, octonary, ogdoad, VIII |
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| octopod | (noun) a cephalopod with eight arms but lacking an internal shell | - |
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| oersted | (noun) the magnetic field strength 1 cm from a unit magnetic pole | - |
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| ogdoad | (noun) the cardinal number that is the sum of seven and one | Synonyms: 8, eight, eighter, eighter from Decatur, octad, octet, octonary, VIII |
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| oilbird | (noun) nocturnal fruit-eating bird of South America that has fatty young yielding an oil that is used instead of butter | Synonyms: guacharo, Steatornis caripensis |
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| oilfield | (noun) a region rich in petroleum deposits (especially one with producing oil wells) | - |
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| oilseed | (noun) any of several seeds that yield oil | Synonyms: oil-rich seed |
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| old | (noun) past times | - |
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| ootid | (noun) mature ovum after penetration by sperm but before the formation of a zygote | - |
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| operand | (noun) a quantity upon which a mathematical operation is performed | - |
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| orangewood | (noun) fine-grained wood of an orange tree; used in fine woodwork | - |
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| orchard | (noun) garden consisting of a small cultivated wood without undergrowth | Synonyms: grove, plantation, woodlet |
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| orchid | (noun) any of numerous plants of the orchid family usually having flowers of unusual shapes and beautiful colors | Synonyms: orchidaceous plant |
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| ordinand | (noun) a person being ordained | - |
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| ornithomimid | (noun) lightly built medium-sized dinosaur having extremely long limbs and necks with small heads and big brains and large eyes | - |
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| ornithopod | (noun) bipedal herbivorous dinosaur | Synonyms: ornithopod dinosaur |
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| orphanhood | (noun) the condition of being a child without living parents | Synonyms: orphanage |
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| osmund | (noun) any fern of the genus Osmunda: large ferns with creeping rhizomes; naked sporangia are on modified fronds that resemble flower clusters | Synonyms: flowering fern |
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| ostracod | (noun) tiny marine and freshwater crustaceans with a shrimp-like body enclosed in a bivalve shell | Synonyms: mussel shrimp, seed shrimp |
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| otherworld | (noun) an abstract spiritual world beyond earthly reality | - |
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| otterhound | (noun) hardy British hound having long pendulous ears and a thick coarse shaggy coat with an oily undercoat; bred for hunting otters | Synonyms: otter hound |
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| outboard | (noun) internal-combustion engine that mounts at stern of small boat | Synonyms: outboard motor |
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| (noun) a motorboat with an outboard motor | Synonyms: outboard motorboat |
| outfield | (noun) the area of a baseball playing field beyond the lines connecting the bases | - |
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| ovenbird | (noun) American warbler; builds a dome-shaped nest on the ground | Synonyms: Seiurus aurocapillus |
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| (noun) small brownish South American birds that build oven-shaped clay nests | - |
| overbid | (noun) a bid that is higher than preceding bids | - |
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| (noun) (bridge) a bid that is higher than your opponent's bid (especially when your partner has not bid at all and your bid exceeds the value of your hand) | Synonyms: overcall |
| overhead | (noun) a hard return hitting the tennis ball above your head | Synonyms: smash |
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| (noun) (nautical) the top surface of an enclosed space on a ship | - |
| (noun) a transparency for use with an overhead projector | Synonyms: viewgraph |
| (noun) (computer science) the disk space required for information that is not data but is used for location and timing | Synonyms: disk overhead |
| (noun) the expense of maintaining property (e.g., paying property taxes and utilities and insurance); it does not include depreciation or the cost of financing or income taxes | Synonyms: budget items, operating cost, operating expense |
| (noun) (computer science) the processing time required by a device prior to the execution of a command | Synonyms: command overhead, command processing overhead, command processing overhead time |
| overload | (noun) an excessive burden | Synonyms: overburden |
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| (noun) an electrical load that exceeds the available electrical power | - |
| overlord | (noun) a person who has general authority over others | Synonyms: lord, master |
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| oviraptorid | (noun) advanced carnivorous theropods, characterized by their toothless, parrot-like beaks and, in several cases, elaborate crests | - |
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| ovoid | (noun) an egg-shaped object | - |
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| oxford | (noun) a low shoe laced over the instep | - |
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| oxyacid | (noun) any acid that contains oxygen | Synonyms: oxygen acid |
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| packthread | (noun) a strong three-ply twine used to sew or tie packages | - |
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| pad | (noun) the fleshy cushion-like underside of an animal's foot or of a human's finger | - |
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| (noun) a flat mass of soft material used for protection, stuffing, or comfort | - |
| (noun) a platform from which rockets or space craft are launched | Synonyms: launch area, launch pad, launching pad, launchpad |
| (noun) temporary living quarters | Synonyms: diggings, digs, domiciliation, lodgings |
| (noun) a block of absorbent material saturated with ink; used to transfer ink evenly to a rubber stamp | Synonyms: inking pad, inkpad, stamp pad |
| (noun) the large floating leaf of an aquatic plant (as the water lily) | - |
| (noun) a number of sheets of paper fastened together along one edge | Synonyms: pad of paper, tablet |
| paperboard | (noun) a cardboard suitable for making posters | Synonyms: poster board, posterboard |
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| paraboloid | (noun) a surface having parabolic sections parallel to a single coordinate axis and elliptic sections perpendicular to that axis | - |
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| parallelepiped | (noun) a prism whose bases are parallelograms | Synonyms: parallelepipedon, parallelopiped, parallelopipedon |
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| parallelopiped | (noun) a prism whose bases are parallelograms | Synonyms: parallelepiped, parallelepipedon, parallelopipedon |
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| paranoid | (noun) a person afflicted with paranoia | Synonyms: paranoiac |
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| parathyroid | (noun) any one of four endocrine glands situated above or within the thyroid gland | Synonyms: parathyroid gland |
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| paratyphoid | (noun) any of a variety of infectious intestinal diseases resembling typhoid fever | Synonyms: paratyphoid fever |
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| parenthood | (noun) the state of being a parent | Synonyms: parentage |
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| parkland | (noun) a large area of land preserved in its natural state as public property | Synonyms: park |
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| parlormaid | (noun) a maid in a private home whose duties are to care for the parlor and the table and to answer the door | Synonyms: parlourmaid |
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| parlourmaid | (noun) a maid in a private home whose duties are to care for the parlor and the table and to answer the door | Synonyms: parlormaid |
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| password | (noun) a secret word or phrase known only to a restricted group | Synonyms: countersign, parole, watchword, word |
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| pasteboard | (noun) stiff cardboard made by pasting together layers of paper | - |
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| pastureland | (noun) a field covered with grass or herbage and suitable for grazing by livestock | Synonyms: grazing land, lea, ley, pasture, pasture land |
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| patchboard | (noun) telephone central where circuits are completed with patchcords | Synonyms: plugboard, switchboard |
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| patchcord | (noun) a length of wire that has a plug at each end; used to make connections at a patchboard | - |
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| payload | (noun) goods carried by a large vehicle | Synonyms: cargo, consignment, freight, lading, load, loading, shipment |
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| (noun) the front part of a guided missile or rocket or torpedo that carries the nuclear or explosive charge or the chemical or biological agents | Synonyms: load, warhead |
| peachwood | (noun) tropical tree with prickly trunk; its heavy red wood yields a red dye and is used for cabinetry | Synonyms: brazilwood, Caesalpinia echinata, peach-wood, pernambuco wood |
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| pearlweed | (noun) any of various low-growing plants of the genus Sagina having small spherical flowers resembling pearls | Synonyms: pearl-weed, pearlwort |
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| peasanthood | (noun) the state of being a peasant | - |
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| peasecod | (noun) husk of a pea; edible in some garden peas | Synonyms: pea pod |
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| peckerwood | (noun) bird with strong claws and a stiff tail adapted for climbing and a hard chisel-like bill for boring into wood for insects | Synonyms: pecker, woodpecker |
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| pedwood | (noun) European deciduous shrub turning red in autumn having dull white flowers | Synonyms: blood-twig, common European dogwood, Cornus sanguinea, red dogwood |
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| pegboard | (noun) a board perforated with regularly spaced holes into which pegs can be fitted | - |
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| pelecypod | (noun) marine or freshwater mollusks having a soft body with platelike gills enclosed within two shells hinged together | Synonyms: bivalve, lamellibranch |
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| pentad | (noun) the cardinal number that is the sum of four and one | Synonyms: 5, cinque, fin, five, fivesome, Little Phoebe, Phoebe, quint, quintet, quintuplet, V |
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| pentastomid | (noun) wormlike arthropod having two pairs of hooks at the sides of the mouth; parasitic in nasal sinuses of mammals | Synonyms: tongue worm |
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| pepperwood | (noun) Pacific coast tree having aromatic foliage and small umbellate flowers followed by olivelike fruit; yields a hard tough wood | Synonyms: California bay tree, California laurel, California olive, mountain laurel, Oregon myrtle, sassafras laurel, spice tree, Umbellularia californica |
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| percoid | (noun) any of numerous spiny-finned fishes of the order Perciformes | Synonyms: percoid fish, percoidean |
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| period | (noun) a punctuation mark (.) placed at the end of a declarative sentence to indicate a full stop or after abbreviations | Synonyms: full point, full stop, point, stop |
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| (noun) the monthly discharge of blood from the uterus of nonpregnant women from puberty to menopause | Synonyms: catamenia, flow, menses, menstruation, menstruum |
| (noun) an amount of time | Synonyms: period of time, time period |
| (noun) the interval taken to complete one cycle of a regularly repeating phenomenon | - |
| (noun) a unit of geological time during which a system of rocks formed | Synonyms: geological period |
| (noun) the end or completion of something | - |
| (noun) (ice hockey) one of three divisions into which play is divided in hockey games | - |
| personhood | (noun) being a person | - |
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| petard | (noun) an explosive device used to break down a gate or wall | - |
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| petfood | (noun) food prepared for animal pets | Synonyms: pet-food, pet food |
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| phasianid | (noun) a kind of game bird in the family Phasianidae | - |
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| phasmid | (noun) large cylindrical or flattened mostly tropical insects with long strong legs that feed on plants; walking sticks and leaf insects | Synonyms: phasmid insect |
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| phoronid | (noun) hermaphrodite wormlike animal living in mud of the sea bottom | - |
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