| billystick | (noun) a short stout club used primarily by policemen | Synonyms: baton, billy, billy club, nightstick, truncheon |
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| bilsted | (noun) a North American tree of the genus Liquidambar having prickly spherical fruit clusters and fragrant sap | Synonyms: American sweet gum, Liquidambar styraciflua, red gum, sweet gum, sweet gum tree |
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| bimester | (noun) a period of 2 months | - |
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| bimestrial | (adjective) two months long; lasting two months | - |
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| (adjective) occurring every two months | Synonyms: bimonthly |
| bimetallist | (noun) an advocate of bimetallism | - |
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| bimetallistic | (adjective) pertaining to a monetary system based on two metals | Synonyms: bimetallic |
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| biocatalyst | (noun) a biochemical catalyst such as an enzyme | - |
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| biochemist | (noun) someone with special training in biochemistry | - |
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| biochemistry | (noun) the organic chemistry of compounds and processes occurring in organisms; the effort to understand biology within the context of chemistry | - |
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| biologist | (noun) (biology) a scientist who studies living organisms | Synonyms: life scientist |
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| biologistic | (adjective) of or relating to biologism | - |
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| biophysicist | (noun) a physicist who applies the methods of physics to biology | - |
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| biostatistics | (noun) a branch of biology that studies biological phenomena and observations by means of statistical analysis | Synonyms: biometrics, biometry |
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| biosystematic | (adjective) of or relating to biosystematics | - |
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| biosystematics | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematy |
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| biosystematy | (noun) use of data (e.g. cytogenetic or biochemical) to assess taxonomic relations especially within an evolutionary framework | Synonyms: biosystematics |
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| 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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| 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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| 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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| bitumastic | (noun) a protective coating of asphalt and filter used on structural metals that are exposed to weathering | - |
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| blacklist | (noun) a list of people who are out of favor | Synonyms: black book, shitlist |
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| (verb) put on a blacklist so as to banish or cause to be boycotted | - |
| blast | (noun) a very long fly ball | - |
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| (noun) intense adverse criticism | Synonyms: attack, fire, flack, flak |
| (noun) an explosion (as of dynamite) | - |
| (noun) a sudden very loud noise | Synonyms: bam, bang, clap, eruption |
| (noun) a highly pleasurable or exciting experience | Synonyms: good time |
| (noun) a strong current of air | Synonyms: blow, gust |
| (verb) shatter as if by explosion | Synonyms: knock down |
| (verb) shrivel or wither or mature imperfectly | - |
| (verb) criticize harshly or violently | Synonyms: crucify, pillory, savage |
| (verb) use explosives on | Synonyms: shell |
| (verb) fire a shot; release | Synonyms: shoot |
| (verb) hit with great force | Synonyms: boom, nail, smash |
| (verb) create by using explosives | Synonyms: shell |
| (verb) make with or as if with an explosion | - |
| (verb) apply a draft or strong wind to to | - |
| (verb) make a strident sound | Synonyms: blare |
| blasted | (adjective) expletives used informally as intensifiers | Synonyms: blame, blamed, blessed, damn, damned, darned, deuced, goddam, goddamn, goddamned, infernal |
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| blastema | (noun) a mass of undifferentiated cells from which an organ or body part develops | - |
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| blastemal | (adjective) of or relating to blastemata | Synonyms: blastematic, blastemic |
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| blastematic | (adjective) of or relating to blastemata | Synonyms: blastemal, blastemic |
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| blastemic | (adjective) of or relating to blastemata | Synonyms: blastemal, blastematic |
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| blaster | (noun) a workman employed to blast with explosives | Synonyms: chargeman |
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| blasting | (adjective) causing injury or blight; especially affecting with sudden violence or plague or ruin | Synonyms: ruinous |
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| (adjective) unpleasantly loud and penetrating | Synonyms: blaring |
| blastocele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocoel, blastocoele, cleavage cavity, segmentation cavity |
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| blastocoel | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoele, cleavage cavity, segmentation cavity |
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| blastocoele | (noun) the fluid-filled cavity inside a blastula | Synonyms: blastocele, blastocoel, cleavage cavity, segmentation cavity |
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| blastocoelic | (adjective) of or relating to a segmentation cavity | - |
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| blastocyst | (noun) the blastula of a placental mammal in which some differentiation of cells has occurred | Synonyms: blastodermic vessicle |
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| blastocyte | (noun) an undifferentiated embryonic cell | - |
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| blastocytoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastoma, embryonal carcinosarcoma |
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| blastoderm | (noun) a layer of cells on the inside of the blastula | Synonyms: blastodisc, germinal area, germinal disc |
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| blastodermatic | (adjective) of or relating to a blastoderm | Synonyms: blastodermic |
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| blastodermic | (adjective) of or relating to a blastoderm | Synonyms: blastodermatic |
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| blastodisc | (noun) a layer of cells on the inside of the blastula | Synonyms: blastoderm, germinal area, germinal disc |
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| blastoff | (noun) the launching of a missile or spacecraft to a specified destination | Synonyms: shot |
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| blastogenesis | (noun) theory that inherited characteristics are transmitted by germ plasm | - |
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| (noun) asexual reproduction by budding | - |
| blastogenetic | (adjective) of or relating to blastogenesis | - |
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| blastoma | (noun) a tumor composed of immature undifferentiated cells | Synonyms: blastocytoma, embryonal carcinosarcoma |
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| blastomere | (noun) any cell resulting from cleavage of a fertilized egg | - |
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| blastomeric | (adjective) of or relating to a blastomere | - |
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| blastomycete | (noun) any of various yeastlike budding fungi of the genus Blastomyces; cause disease in humans and other animals | - |
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| blastomycosis | (noun) any of several infections of the skin or mucous membrane caused by Blastomyces | - |
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| blastomycotic | (adjective) of or relating to or characteristic of blastomycosis | - |
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| blastoporal | (adjective) of or relating to a blastopore | Synonyms: blastoporic |
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| blastopore | (noun) the opening into the archenteron | - |
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| blastoporic | (adjective) of or relating to a blastopore | Synonyms: blastoporal |
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| blastosphere | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastula |
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| blastospheric | (adjective) of or relating to a blastula | Synonyms: blastular |
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| blastula | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastosphere |
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| blastular | (adjective) of or relating to a blastula | Synonyms: blastospheric |
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| blest | (adjective) highly favored or fortunate (as e.g. by divine grace) | Synonyms: blessed |
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| blister | (noun) (pathology) an elevation of the skin filled with serous fluid | Synonyms: bleb, bulla |
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| (noun) (botany) a swelling on a plant similar to that on the skin | - |
| (noun) a flaw on a surface resulting when an applied substance does not adhere (as an air bubble in a coat of paint) | - |
| (verb) get blistered | Synonyms: vesicate |
| (verb) cause blisters to form on | - |
| (verb) subject to harsh criticism | Synonyms: scald, scorch, whip |
| blistering | (adjective) very fast; capable of quick response and great speed | Synonyms: hot, red-hot |
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| (adjective) hot enough to raise (or as if to raise) blisters | Synonyms: blistery |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, bitter, caustic, sulfurous, sulphurous, virulent, vitriolic |
| (noun) the formation of vesicles in or beneath the skin | Synonyms: vesication, vesiculation |
| blistery | (adjective) hot enough to raise (or as if to raise) blisters | Synonyms: blistering |
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| (adjective) covered with small blisters | Synonyms: blebby |
| blockbuster | (noun) an unusually successful hit with widespread popularity and huge sales (especially a movie or play or recording or novel) | Synonyms: megahit, smash hit |
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| (noun) a large bomb used to demolish extensive areas (as a city block) | - |
| bloodlust | (noun) a desire for bloodshed | - |
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| bloodstain | (noun) a discoloration caused by blood | - |
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| bloodstained | (adjective) covered with blood | Synonyms: gory |
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| bloodstock | (noun) thoroughbred horses (collectively) | - |
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| bloodstone | (noun) green chalcedony with red spots that resemble blood | Synonyms: heliotrope |
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| bloodstream | (noun) the blood flowing through the circulatory system | Synonyms: blood stream |
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| bloodthirstiness | (noun) a disposition to shed blood | Synonyms: bloodiness |
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| bloodthirsty | (adjective) marked by eagerness to resort to violence and bloodshed | Synonyms: bloody-minded, sanguinary |
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| bluestem | (noun) tall grass with smooth bluish leaf sheaths grown for hay in the United States | Synonyms: Andropogon furcatus, Andropogon gerardii, blue stem |
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| bluestocking | (noun) a woman having literary or intellectual interests | Synonyms: bas bleu |
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| bluestone | (noun) bluish-grey sandstone used for paving and building | - |
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| bluster | (noun) a swaggering show of courage | Synonyms: bravado |
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| (noun) vain and empty boasting | Synonyms: braggadocio, rhodomontade, rodomontade |
| (noun) a violent gusty wind | - |
| (noun) noisy confusion and turbulence | - |
| (verb) act in an arrogant, overly self-assured, or conceited manner | Synonyms: swagger, swash |
| (verb) show off | Synonyms: blow, boast, brag, gas, gasconade, shoot a line, swash, tout, vaunt |
| (verb) blow hard; be gusty, as of wind | - |
| blusterer | (noun) a person who causes trouble by speaking indiscreetly | Synonyms: loudmouth |
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| blustering | (adjective) blowing in violent and abrupt bursts | Synonyms: blusterous, blustery |
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| blusterous | (adjective) blowing in violent and abrupt bursts | Synonyms: blustering, blustery |
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| blustery | (adjective) noisily domineering; tending to browbeat others | Synonyms: bullying |
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| (adjective) blowing in violent and abrupt bursts | Synonyms: blustering, blusterous |
| boast | (noun) speaking of yourself in superlatives | Synonyms: boasting, jactitation, self-praise |
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| (verb) show off | Synonyms: blow, bluster, brag, gas, gasconade, shoot a line, swash, tout, vaunt |
| (verb) wear or display in an ostentatious or proud manner | Synonyms: feature, sport |
| boaster | (noun) a very boastful and talkative person | Synonyms: blowhard, braggart, bragger, line-shooter, vaunter |
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| boastful | (adjective) exhibiting self-importance | Synonyms: big, braggart, bragging, braggy, cock-a-hoop, crowing, self-aggrandising, self-aggrandizing |
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| boastfully | (adverb) in a boastful manner | Synonyms: big, large, vauntingly |
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| boastfulness | (noun) outspoken conceit | Synonyms: vainglory |
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| boasting | (noun) speaking of yourself in superlatives | Synonyms: boast, jactitation, self-praise |
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| boisterous | (adjective) noisy and lacking in restraint or discipline | Synonyms: rambunctious, robustious, rumbustious, unruly |
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| (adjective) full of rough and exuberant animal spirits | Synonyms: knockabout |
| (adjective) violently agitated and turbulent | Synonyms: fierce, rough |
| boisterously | (adverb) in a carefree manner | Synonyms: rollickingly |
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| boisterousness | (noun) the property of being noisy and lively and unrestrained | - |
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| (noun) a turbulent and stormy state of the sea | - |
| bolster | (noun) a pillow that is often put across a bed underneath the regular pillows | Synonyms: long pillow |
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| (verb) add padding to | Synonyms: pad |
| (verb) support and strengthen | Synonyms: bolster up |
| (verb) prop up with a pillow or bolster | - |
| bombast | (noun) pompous or pretentious talk or writing | Synonyms: blah, claptrap, fustian, rant |
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| bombastic | (adjective) ostentatiously lofty in style | Synonyms: declamatory, large, orotund, tumid, turgid |
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| bombastically | (adverb) in a grandiose manner | Synonyms: grandiosely |
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| (adverb) in a turgid manner | Synonyms: turgidly |
| bonavist | (noun) perennial twining vine of Old World tropics having trifoliate leaves and racemes of fragrant purple pea-like flowers followed by maroon pods of edible seeds; grown as an ornamental and as a vegetable on the Indian subcontinent; sometimes placed in genus Dolichos | Synonyms: Dolichos lablab, Egyptian bean, hyacinth bean, Indian bean, Lablab purpureus |
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| bookstall | (noun) a shop where books are sold | Synonyms: bookshop, bookstore |
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| bookstore | (noun) a shop where books are sold | Synonyms: bookshop, bookstall |
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| boost | (noun) the act of giving hope or support to someone | Synonyms: encouragement |
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| (noun) the act of giving a push | - |
| (noun) an increase in cost | Synonyms: cost increase, hike, rise |
| (verb) increase or raise | Synonyms: advance, supercharge |
| (verb) give a boost to; be beneficial to | - |
| (verb) push or shove upward, as if from below or behind | - |
| (verb) increase | Synonyms: hike, hike up |
| (verb) contribute to the progress or growth of | Synonyms: advance, encourage, further, promote |