| barite | (noun) a white or colorless mineral (BaSO4); the main source of barium | Synonyms: barium sulphate, barytes, heavy spar |
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| baritone | (noun) the second lowest brass wind instrument | Synonyms: baritone horn |
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| (noun) the second lowest adult male singing voice | Synonyms: baritone voice |
| (noun) a male singer | Synonyms: barytone |
| barium | (noun) a soft silvery metallic element of the alkali earth group; found in barite | Synonyms: atomic number 56, Ba |
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| bark | (noun) a sailing ship with 3 (or more) masts | Synonyms: barque |
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| (noun) the sound made by a dog | - |
| (noun) a noise resembling the bark of a dog | - |
| (noun) tough protective covering of the woody stems and roots of trees and other woody plants | - |
| barkeep | (noun) an employee who mixes and serves alcoholic drinks at a bar | Synonyms: barkeeper, bartender, mixologist |
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| barkeeper | (noun) an employee who mixes and serves alcoholic drinks at a bar | Synonyms: barkeep, bartender, mixologist |
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| barker | (noun) informal terms for dogs | Synonyms: bow-wow, doggie, doggy, pooch |
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| (noun) someone who stands in front of a show (as at a carnival) and gives a loud colorful sales talk to potential customers | - |
| barley | (noun) a grain of barley | Synonyms: barleycorn |
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| (noun) cultivated since prehistoric times; grown for forage and grain | - |
| barleycorn | (noun) a grain of barley | Synonyms: barley |
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| (noun) a grain of barley | - |
| barm | (noun) a commercial leavening agent containing yeast cells; used to raise the dough in making bread and for fermenting beer or whiskey | Synonyms: yeast |
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| barmaid | (noun) a female bartender | - |
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| barman | (noun) a male employee who mixes and serves alcoholic drinks at a bar | - |
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| barmbrack | (noun) a rich currant cake or bun | - |
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| barn | (noun) an outlying farm building for storing grain or animal feed and housing farm animals | - |
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| (noun) (physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter | Synonyms: b |
| barnacle | (noun) marine crustaceans with feathery food-catching appendages; free-swimming as larvae; as adults form a hard shell and live attached to submerged surfaces | Synonyms: cirriped, cirripede |
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| (noun) European goose smaller than the brant; breeds in the far north | Synonyms: barnacle goose, Branta leucopsis |
| barnburner | (noun) an impressively successful event | - |
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| (noun) someone who burns down a barn | - |
| barndoor | (noun) an opaque adjustable flap on a lamp fixture; used in photography to cut off light from particular areas | - |
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| barnful | (noun) the quantity that a barn will hold | - |
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| barnstormer | (noun) a pilot who travels around the country giving exhibits of stunt flying and parachuting | Synonyms: stunt flier, stunt pilot |
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| (noun) an actor who travels around the country presenting plays | Synonyms: play-actor, playactor, trouper |
| barnyard | (noun) a yard adjoining a barn | - |
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| barograph | (noun) a recording barometer; automatically records on paper the variations in atmospheric pressure | - |
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| barometer | (noun) an instrument that measures atmospheric pressure | - |
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| baron | (noun) a British peer of the lowest rank | - |
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| (noun) a very wealthy or powerful businessman | Synonyms: big businessman, business leader, king, magnate, mogul, power, top executive, tycoon |
| (noun) a nobleman (in various countries) of varying rank | - |
| baronage | (noun) the peers of a kingdom considered as a group | Synonyms: peerage |
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| baronduki | (noun) terrestrial Siberian squirrel | Synonyms: baranduki, barunduki, burunduki, Eutamius asiaticus, Eutamius sibiricus |
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| baroness | (noun) a noblewoman who holds the rank of baron or who is the wife or widow of a baron | - |
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| baronet | (noun) a member of the British order of honor; ranks below a baron but above a knight | Synonyms: Bart |
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| baronetage | (noun) the state of a baronet | - |
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| (noun) the collective body of baronets | - |
| baronetcy | (noun) the title of a baron | - |
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| (noun) the rank or dignity or position of a baronet or baroness | Synonyms: barony |
| barong | (noun) a knife resembling a cleaver; used in the Philippines | - |
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| barony | (noun) the domain of a baron | - |
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| (noun) the estate of a baron | - |
| (noun) the rank or dignity or position of a baronet or baroness | Synonyms: baronetcy |
| baroque | (noun) elaborate and extensive ornamentation in decorative art and architecture that flourished in Europe in the 17th century | Synonyms: baroqueness |
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| baroqueness | (noun) elaborate and extensive ornamentation in decorative art and architecture that flourished in Europe in the 17th century | Synonyms: baroque |
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| baroreceptor | (noun) a sensory receptor that responds to pressure | - |
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| barosaur | (noun) a dinosaur that could grow to be as tall as a building five stories tall | Synonyms: barosaurus |
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| barosaurus | (noun) a dinosaur that could grow to be as tall as a building five stories tall | Synonyms: barosaur |
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| barouche | (noun) a horse-drawn carriage having four wheels; has an outside seat for the driver and facing inside seats for two couples and a folding top | - |
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| barque | (noun) a sailing ship with 3 (or more) masts | Synonyms: bark |
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| barrack | (noun) a building or group of buildings used to house military personnel | - |
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| barracking | (noun) shouting to interrupt a speech with which you disagree | Synonyms: heckling |
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| barracouta | (noun) a large marine food fish common on the coasts of Australia, New Zealand, and southern Africa | Synonyms: snoek |
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| barracuda | (noun) any voracious marine fish of the genus Sphyraena having an elongated cylindrical body and large mouth with projecting lower jaw and long strong teeth | - |
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| barrage | (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage fire, battery, bombardment, shelling |
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| (noun) the rapid and continuous delivery of linguistic communication (spoken or written) | Synonyms: bombardment, onslaught, outpouring |
| barramundi | (noun) a species of large perch noted for its sporting and eating qualities; lives in marine, estuary, and freshwater habitats | Synonyms: Asian seabass, giant perch, giant seaperch, Lates calcarifer, white seabass |
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| barrater | (noun) someone guilty of barratry | Synonyms: barrator |
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| barrator | (noun) someone guilty of barratry | Synonyms: barrater |
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| barratry | (noun) the offense of vexatiously persisting in inciting lawsuits and quarrels | - |
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| (noun) (maritime law) a fraudulent breach of duty by the master of a ship that injures the owner of the ship or its cargo; includes every breach of trust such as stealing or sinking or deserting the ship or embezzling the cargo | - |
| (noun) the crime of a judge whose judgment is influenced by bribery | - |
| (noun) traffic in ecclesiastical offices or preferments | Synonyms: simony |
| barrel | (noun) a cylindrical container that holds liquids | Synonyms: cask |
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| (noun) a tube through which a bullet travels when a gun is fired | Synonyms: gun barrel |
| (noun) any of various units of capacity | Synonyms: bbl |
| (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrelful |
| (noun) a bulging cylindrical shape; hollow with flat ends | Synonyms: drum |
| barrelfish | (noun) blackish fish of New England waters | Synonyms: black rudderfish, Hyperglyphe perciformis |
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| barrelful | (noun) the quantity that a barrel (of any size) will hold | Synonyms: barrel |
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| barrelhouse | (noun) a cheap drinking and dancing establishment | Synonyms: honky-tonk |
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| barrels | (noun) the amount that many barrels might hold | - |
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| barren | (noun) an uninhabited wilderness that is worthless for cultivation | Synonyms: waste, wasteland |
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| barrenness | (noun) the quality of yielding nothing of value | Synonyms: aridity, fruitlessness |
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| (noun) the state (usually of a woman) of having no children or being unable to have children | - |
| barrenwort | (noun) slow-growing creeping plant with semi-evergreen leaves on erect wiry stems; used as ground cover | Synonyms: bishop's hat, Epimedium grandiflorum |
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| barrette | (noun) a pin for holding women's hair in place | - |
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| barretter | (noun) a resistor inserted into a circuit to compensate for changes (as those arising from temperature fluctuations) | Synonyms: ballast, ballast resistor |
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| barricade | (noun) a barrier set up by police to stop traffic on a street or road in order to catch a fugitive or inspect traffic etc. | Synonyms: roadblock |
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| (noun) a barrier (usually thrown up hastily) to impede the advance of an enemy | - |
| barrier | (noun) a structure or object that impedes free movement | - |
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| (noun) any condition that makes it difficult to make progress or to achieve an objective | Synonyms: roadblock |
| (noun) anything serving to maintain separation by obstructing vision or access | - |
| barring | (noun) the act of excluding someone by a negative vote or veto | Synonyms: blackball |
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| barrio | (noun) an urban area in a Spanish-speaking country | - |
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| (noun) a Spanish-speaking quarter in a town or city (especially in the United States) | - |
| barrister | (noun) a British or Canadian lawyer who speaks in the higher courts of law on behalf of either the defense or prosecution | - |
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| barroom | (noun) a room or establishment where alcoholic drinks are served over a counter | Synonyms: bar, ginmill, saloon, taproom |
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| barrow | (noun) a cart for carrying small loads; has handles and one or more wheels | Synonyms: garden cart, lawn cart, wheelbarrow |
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| (noun) (archeology) a heap of earth placed over prehistoric tombs | Synonyms: burial mound, grave mound, tumulus |
| (noun) the quantity that a barrow will hold | Synonyms: barrowful |
| barrowful | (noun) the quantity that a barrow will hold | Synonyms: barrow |
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| bars | (noun) gymnastic apparatus consisting of two parallel wooden rods supported on uprights | Synonyms: parallel bars |
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| bartender | (noun) an employee who mixes and serves alcoholic drinks at a bar | Synonyms: barkeep, barkeeper, mixologist |
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| barter | (noun) an equal exchange | Synonyms: swap, swop, trade |
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| barterer | (noun) a trader who exchanges goods and not money | - |
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| bartlett | (noun) juicy yellow pear | Synonyms: bartlett pear |
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| bartonia | (noun) annual grown especially for its fragrant golden nocturnal flowers | Synonyms: Mentzelia lindleyi |
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| barunduki | (noun) terrestrial Siberian squirrel | Synonyms: baranduki, baronduki, burunduki, Eutamius asiaticus, Eutamius sibiricus |
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| barycenter | (noun) (astronomy) the common center of mass around which two or more bodies revolve | - |
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| barye | (noun) the absolute unit of pressure equal to one dyne per square centimeter | Synonyms: bar absolute, microbar |
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| baryon | (noun) any of the elementary particles having a mass equal to or greater than that of a proton and that participate in strong interactions; a hadron with a baryon number of +1 | Synonyms: heavy particle |
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| baryta | (noun) any of several compounds of barium | - |
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| barytes | (noun) a white or colorless mineral (BaSO4); the main source of barium | Synonyms: barite, barium sulphate, heavy spar |
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| barytone | (noun) a male singer | Synonyms: baritone |
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| basalt | (noun) the commonest type of solidified lava; a dense dark grey fine-grained igneous rock that is composed chiefly of plagioclase feldspar and pyroxene | - |
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| bascule | (noun) a structure or device in which one end is counterbalanced by the other (on the principle of the seesaw) | - |
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| base | (noun) a support or foundation | Synonyms: pedestal, stand |
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| (noun) lowest support of a structure | Synonyms: foot, foundation, fundament, groundwork, substructure, understructure |
| (noun) a place that the runner must touch before scoring | Synonyms: bag |
| (noun) (electronics) the part of a transistor that separates the emitter from the collector | - |
| (noun) installation from which a military force initiates operations | Synonyms: base of operations |
| (noun) a flat bottom on which something is intended to sit | - |
| (noun) the stock of basic facilities and capital equipment needed for the functioning of a country or area | Synonyms: infrastructure |
| (noun) the principal ingredient of a mixture | - |
| (noun) the fundamental assumptions from which something is begun or developed or calculated or explained | Synonyms: basis, cornerstone, foundation, fundament, groundwork |
| (noun) (linguistics) the form of a word after all affixes are removed | Synonyms: radical, root, root word, stem, theme |
| (noun) a lower limit | Synonyms: floor |
| (noun) (anatomy) the part of an organ nearest its point of attachment | - |
| (noun) the place where you are stationed and from which missions start and end | Synonyms: home |
| (noun) the bottom or lowest part | - |
| (noun) (numeration system) the positive integer that is equivalent to one in the next higher counting place | Synonyms: radix |
| (noun) the most important or necessary part of something | Synonyms: basis |
| (noun) the bottom side of a geometric figure from which the altitude can be constructed | - |
| (noun) any of various water-soluble compounds capable of turning litmus blue and reacting with an acid to form a salt and water | Synonyms: alkali |
| (noun) a phosphoric ester of a nucleoside; the basic structural unit of nucleic acids (DNA or RNA) | Synonyms: nucleotide |
| baseball | (noun) a ball game played with a bat and ball between two teams of nine players; teams take turns at bat trying to score runs | Synonyms: ball, baseball game |
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| (noun) a ball used in playing baseball | - |
| baseboard | (noun) a molding covering the joint formed by a wall and the floor | Synonyms: mopboard, skirting board |
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| baseline | (noun) the lines a baseball player must follow while running the bases | - |
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| (noun) the back line bounding each end of a tennis or handball court; when serving the server must not step over this line | Synonyms: service line |
| (noun) an imaginary line or standard by which things are measured or compared | - |
| basement | (noun) the lowermost portion of a structure partly or wholly below ground level; often used for storage | Synonyms: cellar |
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| (noun) the ground floor facade or interior in Renaissance architecture | - |
| baseness | (noun) unworthiness by virtue of lacking higher values | Synonyms: contemptibility, despicability, despicableness, sordidness |
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| basenji | (noun) small smooth-haired breed of African origin having a tightly curled tail and the inability to bark | - |
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| bash | (noun) a vigorous blow | Synonyms: bang, belt, knock, smash |
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| (noun) an uproarious party | Synonyms: brawl, do |
| bashfulness | (noun) feeling embarrassed due to modesty | Synonyms: abashment |
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| basic | (noun) (usually in the plural) a necessary commodity for which demand is constant | Synonyms: staple |
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| basics | (noun) principles from which other truths can be derived | Synonyms: basic principle, bedrock, fundamental principle, fundamentals |
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| (noun) a statement of fundamental facts or principles | Synonyms: rudiments |
| basidiocarp | (noun) the fruiting body of a basidiomycete which bears its spores on special cells | - |
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| basidiolichen | (noun) a lichen in which the fungus component is a basidiomycete | - |
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| basidiomycete | (noun) any of various fungi of the subdivision Basidiomycota | Synonyms: basidiomycetous fungi |
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| basidiospore | (noun) a sexually produced fungal spore borne on a basidium | - |
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| basidium | (noun) a small club-shaped structure typically bearing four basidiospores at the ends of minute projections; unique to basidiomycetes | - |
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| basil | (noun) leaves of the common basil; used fresh or dried | Synonyms: sweet basil |
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| (noun) any of several Old World tropical aromatic annual or perennial herbs of the genus Ocimum | - |
| basileus | (noun) a ruler of the eastern Roman Empire | - |
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| basilica | (noun) a Roman building used for public administration | Synonyms: Roman basilica |
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| (noun) an early Christian church designed like a Roman basilica; or a Roman Catholic church or cathedral accorded certain privileges | - |
| basilisk | (noun) small crested arboreal lizard able to run on its hind legs; of tropical America | - |
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| (noun) ancient brass cannon | - |
| (noun) (classical mythology) a serpent (or lizard or dragon) able to kill with its breath or glance | - |