| birdbath | (noun) an ornamental basin (usually in a garden) for birds to bathe in | - |
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| birdbrain | (noun) a person with confused ideas; incapable of serious thought | Synonyms: addle-head, addlehead, loon |
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| birdcage | (noun) a cage in which a bird can be kept | - |
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| birdcall | (noun) a device for imitating a birdcall | - |
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| (noun) the characteristic sound produced by a bird | Synonyms: birdsong, call, song |
| birder | (noun) a person who identifies and studies birds in their natural habitats | Synonyms: bird watcher |
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| birdfeeder | (noun) an outdoor device that supplies food for wild birds | Synonyms: bird feeder, feeder |
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| birdhouse | (noun) a shelter for birds | - |
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| birdie | (noun) badminton equipment consisting of a ball of cork or rubber with a crown of feathers | Synonyms: bird, shuttle, shuttlecock |
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| (noun) (golf) a score of one stroke under par on a hole | - |
| (verb) shoot in one stroke under par | - |
| birdlime | (noun) a sticky adhesive that is smeared on small branches to capture small birds | Synonyms: lime |
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| (verb) spread birdlime on branches to catch birds | Synonyms: lime |
| birdnest | (noun) nest where birds lay their eggs and hatch their young | Synonyms: bird's nest, bird nest |
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| (verb) gather birdnests | Synonyms: bird-nest |
| birdnesting | (noun) hunting for birds' nests to get the eggs | - |
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| birdseed | (noun) food given to birds; usually mixed seeds | Synonyms: bird feed, bird food |
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| birdsong | (noun) the characteristic sound produced by a bird | Synonyms: birdcall, call, song |
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| birdwatch | (verb) watch and study birds in their natural habitat | Synonyms: bird |
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| birefringence | (noun) splitting a ray into two parallel rays polarized perpendicularly | Synonyms: double refraction |
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| birefringent | (adjective) relating to or characterized by double refraction | - |
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| biretta | (noun) a stiff cap with ridges across the crown; worn by Roman Catholic clergy | Synonyms: berretta, birretta |
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| biriani | (noun) an Indian dish made with highly seasoned rice and meat or fish or vegetables | Synonyms: biryani |
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| birken | (adjective) consisting of or made of wood of the birch tree | Synonyms: birch, birchen |
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| birl | (verb) cause to spin | Synonyms: spin, twirl, whirl |
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| (verb) cause a floating log to rotate by treading | Synonyms: birle |
| birle | (verb) cause a floating log to rotate by treading | Synonyms: birl |
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| birling | (noun) rotating a log rapidly in the water (as a competitive sport) | Synonyms: logrolling |
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| birr | (noun) the basic unit of money in Ethiopia; equal to 100 cents | - |
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| (noun) sound of something in rapid motion | Synonyms: whir, whirr, whirring |
| (verb) make a soft swishing sound | Synonyms: purr, whir, whirr, whiz, whizz |
| birretta | (noun) a stiff cap with ridges across the crown; worn by Roman Catholic clergy | Synonyms: berretta, biretta |
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| birth | (noun) the event of being born | Synonyms: nascence, nascency, nativity |
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| (noun) a baby born; an offspring | - |
| (noun) the process of giving birth | Synonyms: birthing, giving birth, parturition |
| (noun) the kinship relation of an offspring to the parents | Synonyms: parentage |
| (noun) the time when something begins (especially life) | - |
| (verb) cause to be born | Synonyms: bear, deliver, give birth, have |
| birthday | (noun) an anniversary of the day on which a person was born (or the celebration of it) | - |
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| (noun) the date on which a person was born | Synonyms: natal day |
| birthing | (noun) the process of giving birth | Synonyms: birth, giving birth, parturition |
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| birthmark | (noun) a blemish on the skin that is formed before birth | Synonyms: nevus |
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| birthplace | (noun) the place where someone was born | Synonyms: place of birth |
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| (noun) where something originated or was nurtured in its early existence | Synonyms: cradle, place of origin, provenance, provenience |
| birthrate | (noun) the ratio of live births in an area to the population of that area; expressed per 1000 population per year | Synonyms: birth rate, fertility, fertility rate, natality |
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| birthright | (noun) a right or privilege that you are entitled to at birth | - |
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| (noun) an inheritance coming by right of birth (especially by primogeniture) | Synonyms: patrimony |
| birthroot | (noun) trillium of eastern North America having malodorous pink to purple flowers and an astringent root used in folk medicine especially to ease childbirth | Synonyms: purple trillium, red trillium, Trillium erectum |
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| birthwort | (noun) creeping plant having curving flowers thought to resemble fetuses; native to Europe; naturalized Great Britain and eastern North America | Synonyms: Aristolochia clematitis |
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| biryani | (noun) an Indian dish made with highly seasoned rice and meat or fish or vegetables | Synonyms: biriani |
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| biscuit | (noun) small round bread leavened with baking-powder or soda | - |
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| (noun) any of various small flat sweet cakes | Synonyms: cookie, cooky |
| bise | (noun) a dry cold north wind in southeastern France | Synonyms: bize |
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| bisect | (verb) cut in half or cut in two | - |
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| bisection | (noun) dividing into two equal parts | - |
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| bisectional | (adjective) of or relating to bisection | - |
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| biserrate | (adjective) having saw-like notches with the notches themselves similarly notched | - |
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| bisexual | (adjective) sexually attracted to both sexes | - |
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| (adjective) having an ambiguous sexual identity | Synonyms: epicene |
| (noun) a person who is sexually attracted to both sexes | Synonyms: bisexual person |
| bisexuality | (noun) sexual activity with both men and women | - |
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| (noun) showing characteristics of both sexes | Synonyms: androgyny, hermaphroditism |
| bishop | (noun) (chess) a piece that can be moved diagonally over unoccupied squares of the same color | - |
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| (noun) port wine mulled with oranges and cloves | - |
| (noun) a senior member of the Christian clergy having spiritual and administrative authority; appointed in Christian churches to oversee priests or ministers; considered in some churches to be successors of the twelve Apostles of Christ | - |
| bishopric | (noun) the territorial jurisdiction of a bishop | Synonyms: diocese, episcopate |
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| bishopry | (noun) the office and dignity of a bishop | Synonyms: episcopate |
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| bismark | (noun) a raised doughnut filled with jelly or jam | Synonyms: Berlin doughnut, jelly doughnut |
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| bismuth | (noun) a heavy brittle diamagnetic trivalent metallic element (resembles arsenic and antimony chemically); usually recovered as a by-product from ores of other metals | Synonyms: atomic number 83, Bi |
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| bismuthal | (adjective) of or relating to bismuth | - |
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| bismuthic | (adjective) containing bismuth (especially in the pentavalent state) | - |
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| bison | (noun) any of several large humped bovids having shaggy manes and large heads and short horns | - |
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| bisontine | (adjective) relating to or characteristic of bison | - |
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| bispak | (noun) A sexually promiscuous Indonesian woman | - |
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| bisque | (noun) a thick cream soup made from shellfish | - |
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| bister | (noun) a water-soluble brownish-yellow pigment made by boiling wood soot | Synonyms: bistre |
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| bistered | (adjective) colored with or as if with bister | Synonyms: bistred |
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| bistre | (noun) a water-soluble brownish-yellow pigment made by boiling wood soot | Synonyms: bister |
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| bistred | (adjective) colored with or as if with bister | Synonyms: bistered |
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| bistro | (noun) a small informal restaurant; serves wine | - |
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| bistroic | (adjective) of or relating to or resembling a bistro | - |
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| bisulcate | (adjective) (used of hooves) split, divided | Synonyms: cloven |
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| bisulfate | (noun) a salt or an ester of sulphuric acid with the chemical formula HSO4-. | Synonyms: hydrogen sulfate |
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| bit | (noun) the cutting part of a drill; usually pointed and threaded and is replaceable in a brace or bitstock or drill press | - |
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| (noun) piece of metal held in horse's mouth by reins and used to control the horse while riding | - |
| (noun) the part of a key that enters a lock and lifts the tumblers | - |
| (noun) a short performance that is part of a longer program | Synonyms: act, number, routine, turn |
| (noun) a small fragment | Synonyms: snatch |
| (noun) an instance of some kind | Synonyms: piece |
| (noun) a small amount of solid food; a mouthful | Synonyms: bite, morsel |
| (noun) a small fragment of something broken off from the whole | Synonyms: chip, flake, fleck, scrap |
| (noun) a unit of measurement of information (from binary + digit); the amount of information in a system having two equiprobable states | - |
| (noun) a small piece or quantity of something | Synonyms: spot |
| (noun) an indefinitely short time | Synonyms: minute, mo, moment, second |
| bitartrate | (noun) an acid tartrate; a hydrogen tartrate | - |
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| bitch | (noun) female of any member of the dog family | - |
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| (noun) informal terms for objecting | Synonyms: beef, gripe, kick, squawk |
| (noun) a person (usually but not necessarily a woman) who is thoroughly disliked | Synonyms: cunt |
| (noun) an unpleasant difficulty | - |
| (verb) say mean things | Synonyms: backbite |
| (verb) complain | Synonyms: beef, bellyache, crab, gripe, grouse, holler, squawk |
| bitchery | (noun) aggressive remarks and behavior like that of a spiteful malicious woman | - |
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| bitchiness | (noun) malevolence by virtue of being malicious or spiteful or nasty | Synonyms: cattiness, nastiness, spite, spitefulness |
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| bitchy | (adjective) marked by or arising from malice | Synonyms: cattish, catty |
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| bite | (noun) the act of gripping or chewing off with the teeth and jaws | Synonyms: chomp |
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| (noun) a portion removed from the whole | - |
| (noun) a strong odor or taste property | Synonyms: pungency, raciness, sharpness |
| (noun) wit having a sharp and caustic quality | Synonyms: pungency |
| (noun) (angling) an instance of a fish taking the bait | - |
| (noun) a light informal meal | Synonyms: collation, snack |
| (noun) a small amount of solid food; a mouthful | Synonyms: bit, morsel |
| (noun) a wound resulting from biting by an animal or a person | - |
| (noun) a painful wound caused by the thrust of an insect's stinger into skin | Synonyms: insect bite, sting |
| (verb) to grip, cut off, or tear with or as if with the teeth or jaws | Synonyms: seize with teeth |
| (verb) penetrate or cut, as with a knife | - |
| (verb) deliver a sting to | Synonyms: prick, sting |
| (verb) cause a sharp or stinging pain or discomfort | Synonyms: burn, sting |
| biteplate | (noun) a removable dental appliance that is worn in the palate for diagnostic or therapeutic purposes | Synonyms: bite plate |
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| biter | (noun) someone who bites | - |
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| bitewing | (noun) a dental X-ray film that can be held in place by the teeth during radiography | - |
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| bitey | (adjective) Having a tendency to bite aggressively | - |
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| biting | (adjective) causing a sharply painful or stinging sensation; used especially of cold | Synonyms: bitter |
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| (adjective) capable of wounding | Synonyms: barbed, mordacious, nipping, pungent |
| bitingly | (adverb) extremely and sharply | Synonyms: bitter, bitterly, piercingly |
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| bitmap | (noun) an image represented as a two dimensional array of brightness values for pixels | Synonyms: electronic image |
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| bitok | (noun) a Russian dish made with patties of ground meat (mixed with onions and bread and milk) and served with a sauce of sour cream | - |
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| bitstock | (noun) a carpenter's tool having a crank handle for turning and a socket to hold a bit for boring | Synonyms: brace |
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| bitt | (noun) a strong post (as on a wharf or quay or ship for attaching mooring lines) | Synonyms: bollard |
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| (verb) secure with a bitt | - |
| bitter | (adjective) proceeding from or exhibiting great hostility or animosity | - |
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| (adjective) very difficult to accept or bear | - |
| (adjective) causing a sharply painful or stinging sensation; used especially of cold | Synonyms: biting |
| (adjective) marked by strong resentment or cynicism | Synonyms: acrimonious |
| (adjective) expressive of severe grief or regret | - |
| (adjective) causing a sharp and acrid taste experience | - |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| (noun) the property of having a harsh unpleasant taste | Synonyms: bitterness |
| (noun) the taste experience when quinine or coffee is taken into the mouth | Synonyms: bitterness |
| (noun) English term for a dry sharp-tasting ale with strong flavor of hops (usually on draft) | - |
| (adverb) extremely and sharply | Synonyms: bitingly, bitterly, piercingly |
| (verb) make bitter | - |
| bittercress | (noun) any of various herbs of the genus Cardamine, having usually pinnate leaves and racemes of white, pink or purple flowers; cosmopolitan except Antarctic | Synonyms: bitter cress |
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| bitterish | (adjective) somewhat bitter | Synonyms: sharp-tasting |
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| bitterly | (adverb) with bitterness; in a resentful manner | - |
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| (adverb) indicating something hard to accept | - |
| (adverb) extremely and sharply | Synonyms: bitingly, bitter, piercingly |
| bittern | (noun) relatively small compact tawny-brown heron with nocturnal habits and a booming cry; found in marshes | - |
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| bitterness | (noun) the property of having a harsh unpleasant taste | Synonyms: bitter |
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| (noun) a rough and bitter manner | Synonyms: acerbity, acrimony, jaundice, tartness, thorniness |
| (noun) the taste experience when quinine or coffee is taken into the mouth | Synonyms: bitter |
| (noun) a feeling of deep and bitter anger and ill-will | Synonyms: gall, rancor, rancour, resentment |
| bitternut | (noun) hickory of the eastern United States having a leaves with 7 or 9 leaflets and thin-shelled very bitter nuts | Synonyms: bitter hickory, bitter pignut, bitternut hickory, Carya cordiformis, swamp hickory |
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| bitterroot | (noun) showy succulent ground-hugging plant of Rocky Mountains regions having deep to pale pink flowers and fleshy farinaceous roots; the Montana state flower | Synonyms: Lewisia rediviva |
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| bitters | (noun) alcoholic liquor flavored with bitter herbs and roots | - |
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| bittersweet | (adjective) tinged with sadness | - |
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| (adjective) having a taste that is a mixture of bitterness and sweetness | Synonyms: semisweet |
| (noun) twining shrub of North America having yellow capsules enclosing scarlet seeds | Synonyms: American bittersweet, Celastrus scandens, climbing bittersweet, false bittersweet, shrubby bittersweet, staff vine, waxwork |
| (noun) poisonous perennial Old World vine having violet flowers and oval coral-red berries; widespread weed in North America | Synonyms: bittersweet nightshade, climbing nightshade, deadly nightshade, poisonous nightshade, Solanum dulcamara, woody nightshade |
| bitterweed | (noun) any of numerous chiefly North American weedy plants constituting the genus Ambrosia that produce highly allergenic pollen responsible for much hay fever and asthma | Synonyms: ambrosia, ragweed |
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| (noun) widespread European weed with spiny tongue-shaped leaves and yellow flowers; naturalized in United States | Synonyms: bristly oxtongue, bugloss, oxtongue, Picris echioides |
| bitterwood | (noun) handsome South American shrub or small tree having bright scarlet flowers and yielding a valuable fine-grained yellowish wood; yields the bitter drug quassia from its wood and bark | Synonyms: quassia, Quassia amara |
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| (noun) West Indian tree yielding the drug Jamaica quassia | Synonyms: Jamaica quassia, Picrasma excelsa, Picrasma excelsum |
| (noun) medium to large tree of tropical North and South America having odd-pinnate leaves and long panicles of small pale yellow flowers followed by scarlet fruits | Synonyms: paradise tree, Simarouba glauca |
| bitthead | (noun) the upper end of a bitt | - |
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| bittie | (adjective) (used informally) little or tiny | Synonyms: bitty, itsy-bitsy, itty-bitty, teensy-weensy, teensy, teentsy, teeny-weeny, teeny, wee, weensy, weeny |
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| bitty | (adjective) (used informally) little or tiny | Synonyms: bittie, itsy-bitsy, itty-bitty, teensy-weensy, teensy, teentsy, teeny-weeny, teeny, wee, weensy, weeny |
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| bitumastic | (noun) a protective coating of asphalt and filter used on structural metals that are exposed to weathering | - |
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| bitumen | (noun) any of various naturally occurring impure mixtures of hydrocarbons | - |
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| bitumenoid | (adjective) like bitumen | Synonyms: bituminoid |
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| bituminise | (verb) treat with bitumen | Synonyms: bituminize |
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| bituminize | (verb) treat with bitumen | Synonyms: bituminise |
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| bituminoid | (adjective) like bitumen | Synonyms: bitumenoid |
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| bituminous | (adjective) resembling or containing bitumen | - |
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