| abcoulomb | (noun) a unit of electrical charge equal to 10 coulombs | - |
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| aplomb | (noun) great coolness and composure under strain | Synonyms: assuredness, cool, poise, sang-froid |
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| beachcomber | (noun) a vagrant living on a beach | - |
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| bomb | (noun) an explosive device fused to explode under specific conditions | - |
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| (noun) strong sealed vessel for measuring heat of combustion | Synonyms: bomb calorimeter |
| (noun) an event that fails badly or is totally ineffectual | Synonyms: dud, turkey |
| bombard | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombardon |
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| bombardier | (noun) the member of a bomber crew responsible for using the bombsight and releasing the bombs on the target | - |
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| (noun) a noncommissioned officer in the British artillery | - |
| bombardment | (noun) the heavy fire of artillery to saturate an area rather than hit a specific target | Synonyms: barrage, barrage fire, battery, shelling |
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| (noun) an attack by dropping bombs | Synonyms: bombing |
| (noun) the act (or an instance) of subjecting a body or substance to the impact of high-energy particles (as electrons or alpha rays) | - |
| (noun) the rapid and continuous delivery of linguistic communication (spoken or written) | Synonyms: barrage, onslaught, outpouring |
| bombardon | (noun) a large shawm; the bass member of the shawm family | Synonyms: bombard |
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| (noun) a tuba that coils over the shoulder of the musician | Synonyms: helicon |
| bombast | (noun) pompous or pretentious talk or writing | Synonyms: blah, claptrap, fustian, rant |
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| bombazine | (noun) a twilled fabric used for dresses; the warp is silk and the weft is worsted | - |
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| bomber | (noun) a military aircraft that drops bombs during flight | - |
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| (noun) a large sandwich made of a long crusty roll split lengthwise and filled with meats and cheese (and tomato and onion and lettuce and condiments); different names are used in different sections of the United States | Synonyms: Cuban sandwich, grinder, hero, hero sandwich, hoagie, hoagy, Italian sandwich, poor boy, sub, submarine, submarine sandwich, torpedo, wedge, zep |
| (noun) a person who plants bombs | - |
| bombie | (noun) an unexploded bomblet | - |
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| bombilation | (noun) sound of rapid vibration | Synonyms: bombination, buzz |
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| bombination | (noun) sound of rapid vibration | Synonyms: bombilation, buzz |
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| bombing | (noun) an attack by dropping bombs | Synonyms: bombardment |
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| (noun) the use of bombs for sabotage; a tactic frequently used by terrorists | - |
| bomblet | (noun) one of the smaller bombs that are released from a cluster bomb | Synonyms: cluster bomblet |
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| bombproof | (noun) a chamber (often underground) reinforced against bombing and provided with food and living facilities; used during air raids | Synonyms: air-raid shelter, bomb shelter |
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| bombshell | (noun) an explosive bomb or artillery shell | - |
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| (noun) a shocking surprise | Synonyms: thunderbolt, thunderclap |
| (noun) an entertainer who has a sensational effect | - |
| bombsight | (noun) a sighting device in an aircraft for aiming bombs | - |
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| bombycid | (noun) moderate-sized Asiatic moth whose larvae feed on mulberry leaves and produce silk | Synonyms: bombycid moth, silkworm moth |
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| buncombe | (noun) unacceptable behavior (especially ludicrously false statements) | Synonyms: bunk, bunkum, guff, hogwash, rot |
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| catacomb | (noun) an underground tunnel with recesses where bodies were buried (as in ancient Rome) | - |
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| cockscomb | (noun) the fleshy red crest on the head of the domestic fowl and other gallinaceous birds | Synonyms: comb, coxcomb |
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| (noun) a cap worn by court jesters; adorned with a strip of red | Synonyms: coxcomb |
| (noun) a conceited dandy who is overly impressed by his own accomplishments | Synonyms: coxcomb |
| (noun) garden annual with featherlike spikes of red or yellow flowers | Synonyms: Celosia argentea cristata, Celosia cristata, common cockscomb |
| comb | (noun) the act of drawing a comb through hair | Synonyms: combing |
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| (noun) ciliated comb-like swimming plate of a ctenophore | - |
| (noun) the fleshy red crest on the head of the domestic fowl and other gallinaceous birds | Synonyms: cockscomb, coxcomb |
| (noun) a flat device with narrow pointed teeth on one edge; disentangles or arranges hair | - |
| (noun) any of several tools for straightening fibers | - |
| combat | (noun) an engagement fought between two military forces | Synonyms: armed combat |
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| (noun) the act of fighting; any contest or struggle | Synonyms: fight, fighting, scrap |
| combatant | (noun) someone who fights (or is fighting) | Synonyms: battler, belligerent, fighter, scrapper |
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| combativeness | (noun) a militant aggressiveness | Synonyms: militance, militancy |
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| comber | (noun) a machine that separates and straightens the fibers of cotton or wool | - |
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| (noun) a long curling sea wave | - |
| (noun) a person who separates and straightens the fibers of cotton or wool | - |
| combination | (noun) the act of combining things to form a new whole | Synonyms: combining, compounding |
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| (noun) the act of arranging elements into specified groups without regard to order | - |
| (noun) a collection of things that have been combined; an assemblage of separate parts or qualities | - |
| (noun) a group of people (often temporary) having a common purpose | - |
| (noun) a sequence of numbers or letters that opens a combination lock | - |
| (noun) an alliance of people or corporations or countries for a special purpose (formerly to achieve some antisocial end but now for general political or economic purposes) | - |
| (noun) a coordinated sequence of chess moves | - |
| combine | (noun) harvester that heads and threshes and cleans grain while moving across the field | - |
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| (noun) an occurrence that results in things being united | Synonyms: combining |
| (noun) a consortium of independent organizations formed to limit competition by controlling the production and distribution of a product or service | Synonyms: cartel, corporate trust, trust |
| combing | (noun) the act of drawing a comb through hair | Synonyms: comb |
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| combining | (noun) the act of combining things to form a new whole | Synonyms: combination, compounding |
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| (noun) an occurrence that results in things being united | Synonyms: combine |
| combo | (noun) a small band of jazz musicians | Synonyms: jazz band, jazz group |
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| combretum | (noun) any of numerous shrubs or small trees of the genus Combretum having spikes of small flowers | - |
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| combustibility | (noun) the quality of being capable of igniting and burning | Synonyms: burnability, combustibleness |
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| combustible | (noun) a substance that can be burned to provide heat or power | Synonyms: combustible material |
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| combustibleness | (noun) the quality of being capable of igniting and burning | Synonyms: burnability, combustibility |
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| combustion | (noun) the act of burning something | Synonyms: burning |
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| (noun) a process in which a substance reacts with oxygen to give heat and light | Synonyms: burning |
| (noun) a state of violent disturbance and excitement | - |
| cothromboplastin | (noun) a coagulation factor formed in the kidney under the influence of vitamin K | Synonyms: factor VII, proconvertin, stable factor |
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| coulomb | (noun) a unit of electrical charge equal to the amount of charge transferred by a current of 1 ampere in 1 second | Synonyms: ampere-second, C |
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| counterbombardment | (noun) bombardment intended to destroy or neutralize enemy weapons | - |
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| coxcomb | (noun) the fleshy red crest on the head of the domestic fowl and other gallinaceous birds | Synonyms: cockscomb, comb |
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| (noun) a cap worn by court jesters; adorned with a strip of red | Synonyms: cockscomb |
| (noun) a conceited dandy who is overly impressed by his own accomplishments | Synonyms: cockscomb |
| currycomb | (noun) a square comb with rows of small teeth; used to curry horses | - |
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| discombobulation | (noun) a feeling of embarrassment that leaves you confused | Synonyms: confusion |
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| dombeya | (noun) any of various shrubs or small trees of the genus Dombeya grown for their rounded clusters of exquisite often sweet-scented flowers usually hanging beneath the leaves | - |
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| entombment | (noun) the ritual placing of a corpse in a grave | Synonyms: burial, inhumation, interment, sepulture |
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| firebomb | (noun) a bomb that is designed to start fires; is most effective against flammable targets (such as fuel) | Synonyms: incendiary, incendiary bomb |
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| hecatomb | (noun) a great sacrifice; an ancient Greek or Roman sacrifice of 100 oxen | - |
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| hombre | (noun) an informal term for a youth or man | Synonyms: bozo, cat, guy, sod |
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| homburg | (noun) a hat made of felt with a creased crown | Synonyms: fedora, felt hat, Stetson, trilby |
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| honeycomb | (noun) a framework of hexagonal cells resembling the honeycomb built by bees | - |
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| (noun) a structure of small hexagonal cells constructed from beeswax by bees and used to store honey and larvae | - |
| hypothrombinemia | (noun) a low level of prothrombin (factor II) in the circulating blood; results in long clotting time and poor clot formation and sometimes excessive bleeding; can result from vitamin K deficiency | - |
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| mombin | (noun) purplish tropical fruit | - |
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| (noun) common tropical American shrub or small tree with purplish fruit | Synonyms: jocote, mombin tree, Spondias purpurea |
| nombril | (noun) the center point on a shield | - |
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| noncombatant | (noun) a member of the armed forces who does not participate in combat (e.g. a chaplain or surgeon) | - |
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| ombu | (noun) fast-growing herbaceous evergreen tree of South America having a broad trunk with high water content and dark green oval leaves | Synonyms: bella sombra, Phytolacca dioica |
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| ombudsman | (noun) a government appointee who investigates complaints by private persons against the government | - |
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| phlebothrombosis | (noun) thrombosis of a vein without prior inflammation of the vein; associated with sluggish blood flow (as in prolonged bedrest or pregnancy or surgery) or with rapid coagulation of the blood | Synonyms: venous thrombosis |
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| pocketcomb | (noun) a small comb suitable for carrying in a pocket | Synonyms: pocket comb |
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| prothrombin | (noun) a protein in blood plasma that is the inactive precursor of thrombin | Synonyms: factor II |
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| prothrombinase | (noun) coagulation factor that is converted to an enzyme that converts prothrombin to thrombin in a reaction that depends on calcium ions and other coagulation factors | Synonyms: factor X |
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| recombinant | (noun) a cell or organism in which genetic recombination has occurred | - |
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| recombination | (noun) (genetics) a combining of genes or characters different from what they were in the parents | - |
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| (noun) (physics) a combining of charges or transfer of electrons in a gas that results in the neutralization of ions; important for ions arising from the passage of high-energy particles | - |
| rhomb | (noun) a parallelogram with four equal sides; an oblique-angled equilateral parallelogram | Synonyms: diamond, rhombus |
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| rhombencephalon | (noun) the posterior portion of the brain including cerebellum and brainstem | Synonyms: hindbrain |
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| rhombohedron | (noun) a parallelepiped bounded by six similar faces (either rhombuses or parallelograms) | - |
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| rhomboid | (noun) any of several muscles of the upper back that help move the shoulder blade | Synonyms: rhomboid muscle |
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| (noun) a parallelogram with adjacent sides of unequal lengths; an oblique-angled parallelogram with only the opposite sides equal | - |
| rhombus | (noun) a parallelogram with four equal sides; an oblique-angled equilateral parallelogram | Synonyms: diamond, rhomb |
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| scombroid | (noun) important marine food and game fishes found in all tropical and temperate seas; some are at least partially endothermic and can thrive in colder waters | Synonyms: scombroid fish |
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| somberness | (noun) a manner that is serious and solemn | Synonyms: graveness, gravity, soberness, sobriety, sombreness |
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| (noun) a feeling of melancholy apprehension | Synonyms: gloom, gloominess, sombreness |
| (noun) a state of partial or total darkness | Synonyms: gloom, sombreness |
| sombreness | (noun) a manner that is serious and solemn | Synonyms: graveness, gravity, soberness, sobriety, somberness |
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| (noun) a feeling of melancholy apprehension | Synonyms: gloom, gloominess, somberness |
| (noun) a state of partial or total darkness | Synonyms: gloom, somberness |
| sombrero | (noun) a straw hat with a tall crown and broad brim; worn in American southwest and in Mexico | - |
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| thrombasthenia | (noun) a rare autosomal recessive disease in which the platelets do not produce clots in the normal way and hemorrhage results | - |
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| thrombectomy | (noun) surgical removal of a blood clot (thrombus) from a blood vessel | - |
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| thrombin | (noun) an enzyme that acts on fibrinogen in blood causing it to clot | - |
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| thrombocyte | (noun) tiny bits of protoplasm found in vertebrate blood; essential for blood clotting | Synonyms: blood platelet, platelet |
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| thrombocytopenia | (noun) a blood disease characterized by an abnormally small number of platelets in the blood | Synonyms: thrombopenia |
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| thrombocytosis | (noun) increase in the number of platelets in the blood which tends to cause clots to form; associated with many neoplasms and chronic infections and other diseases | - |
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| thromboembolism | (noun) occlusion of a blood vessel by an embolus that has broken away from a thrombus | - |
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| thrombokinase | (noun) an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot | Synonyms: factor III, thromboplastin |
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| thrombolysis | (noun) the process of breaking up and dissolving blood clots | - |
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| thrombolytic | (noun) a kind of pharmaceutical that can break up clots blocking the flow of blood to the heart muscle | Synonyms: clot buster, thrombolytic agent |
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| thrombopenia | (noun) a blood disease characterized by an abnormally small number of platelets in the blood | Synonyms: thrombocytopenia |
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| thrombophlebitis | (noun) phlebitis in conjunction with the formation of a blood clot (thrombus) | - |
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| thromboplastin | (noun) an enzyme liberated from blood platelets that converts prothrombin into thrombin as blood starts to clot | Synonyms: factor III, thrombokinase |
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| thrombosis | (noun) the formation or presence of a thrombus (a clot of coagulated blood attached at the site of its formation) in a blood vessel | - |
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| thrombus | (noun) a blood clot formed within a blood vessel and remaining attached to its place of origin | - |
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| tomb | (noun) a place for the burial of a corpse (especially beneath the ground and marked by a tombstone) | Synonyms: grave |
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| tombac | (noun) an alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding | Synonyms: tambac, tombak |
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| tombak | (noun) an alloy of copper and zinc (and sometimes arsenic) used to imitate gold in cheap jewelry and for gilding | Synonyms: tambac, tombac |
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| tombola | (noun) a lottery in which tickets are drawn from a revolving drum | - |
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| tomboy | (noun) a girl who behaves in a boyish manner | Synonyms: hoyden, romp |
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| tomboyishness | (noun) masculinity in women (especially in girls and young women) | Synonyms: hoydenism |
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| tombstone | (noun) a stone that is used to mark a grave | Synonyms: gravestone, headstone |
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| trombiculiasis | (noun) infestation with chiggers | - |
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| trombiculid | (noun) mite that as nymph and adult feeds on early stages of small arthropods but whose larvae are parasitic on terrestrial vertebrates | - |
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| trombidiid | (noun) mite that in all stages feeds on other arthropods | - |
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| trombone | (noun) a brass instrument consisting of a long tube whose length can be varied by a U-shaped slide | - |
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| trombonist | (noun) a musician who plays the trombone | Synonyms: trombone player |
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| womb | (noun) a hollow muscular organ in the pelvic cavity of females; contains the developing fetus | Synonyms: uterus |
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