| airhead | (noun) a bridgehead seized by airborne troops | - |
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| (noun) a flighty scatterbrained simpleton | - |
| amenorrhea | (noun) absence or suppression of normal menstrual flow | Synonyms: amenia, amenorrhoea |
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| antidiarrheal | (noun) a drug used to control or stop diarrhea | Synonyms: antidiarrheal drug |
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| copperhead | (noun) common coppery brown pit viper of upland eastern United States | Synonyms: Agkistrodon contortrix |
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| (noun) venomous but sluggish reddish-brown snake of Australia | Synonyms: Denisonia superba |
| diarrhea | (noun) frequent and watery bowel movements; can be a symptom of infection or food poisoning or colitis or a gastrointestinal tumor | Synonyms: diarrhoea, looseness, looseness of the bowels |
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| dunderhead | (noun) a stupid person; these words are used to express a low opinion of someone's intelligence | Synonyms: blockhead, bonehead, dumbass, dunce, fuckhead, hammerhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull, shithead |
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| dysmenorrhea | (noun) painful menstruation | - |
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| gonorrhea | (noun) a common venereal disease caused by the bacterium Neisseria gonorrhoeae; symptoms are painful urination and pain around the urethra | Synonyms: clap, gonorrhoea |
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| hammerhead | (noun) medium-sized live-bearing shark with eyes at either end of a flattened hammer-shaped head; worldwide in warm waters; can be dangerous | Synonyms: hammerhead shark |
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| (noun) the striking part of a hammer | - |
| (noun) a stupid person; these words are used to express a low opinion of someone's intelligence | Synonyms: blockhead, bonehead, dumbass, dunce, dunderhead, fuckhead, knucklehead, loggerhead, lunkhead, muttonhead, numskull, shithead |
| hypermenorrhea | (noun) abnormally heavy or prolonged menstruation; can be a symptom of uterine tumors and can lead to anemia if prolonged | Synonyms: menorrhagia |
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| letterhead | (noun) a sheet of stationery with name and address of the organization printed at the top | - |
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| leucorrhea | (noun) discharge of white mucous material from the vagina; often an indication of infection | Synonyms: leukorrhea |
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| leukorrhea | (noun) discharge of white mucous material from the vagina; often an indication of infection | Synonyms: leucorrhea |
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| loggerhead | (noun) very large carnivorous sea turtle; wide-ranging in warm open seas | Synonyms: Caretta caretta, loggerhead turtle |
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| (noun) a stupid person; these words are used to express a low opinion of someone's intelligence | Synonyms: blockhead, bonehead, dumbass, dunce, dunderhead, fuckhead, hammerhead, knucklehead, lunkhead, muttonhead, numskull, shithead |
| logorrhea | (noun) pathologically excessive (and often incoherent) talking | Synonyms: logomania |
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| menorrhea | (noun) flow of blood from the uterus; occurs at roughly monthly intervals during a woman's reproductive years | Synonyms: menstrual blood, menstrual flow |
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| oligomenorrhea | (noun) abnormally light or infrequent menstruation | - |
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| otorrhea | (noun) discharge from the external ear | - |
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| 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 |
| overheating | (noun) excessive heating | - |
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| pyorrhea | (noun) discharge of pus | Synonyms: pyorrhoea |
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| (noun) chronic periodontitis; purulent inflammation of the teeth sockets | Synonyms: pyorrhea alveolaris, pyorrhoea, Riggs' disease |
| rhea | (noun) larger of two tall fast-running flightless birds similar to ostriches but three-toed; found from Brazil to Patagonia | Synonyms: Rhea americana |
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| (noun) smaller of two tall fast-running flightless birds similar to ostriches but three-toed; found from Peru to Strait of Magellan | Synonyms: nandu, Pterocnemia pennata |
| rhinorrhea | (noun) persistent watery mucus discharge from the nose (as in the common cold) | - |
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| seborrhea | (noun) a condition in which overactivity of the sebaceous glands causes the skin to become oily | - |
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| showerhead | (noun) a perforated nozzle that showers water on a bather | - |
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| spearhead | (noun) the head and sharpened point of a spear | Synonyms: spear-point, spearpoint |
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| (noun) the leading military unit in an attack | - |
| (noun) someone who leads or initiates an activity (attack or campaign etc.) | - |
| stairhead | (noun) platform at the top of a staircase | - |
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| steatorrhea | (noun) the presence of greater than normal amounts of fat in the feces which are frothy and foul smelling and floating; a symptom of disorders of fat metabolism and malabsorption syndrome | - |
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| tenderheartedness | (noun) warm compassionate feelings | Synonyms: tenderness |
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| thunderhead | (noun) a rounded projecting mass of a cumulus cloud with shining edges; often appears before a thunderstorm | - |
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| warhead | (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, payload |
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