| acerate | (adjective) narrow and long and pointed; as pine leaves | Synonyms: acerose, acicular, needle-shaped |
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| acerb | (adjective) sour or bitter in taste | Synonyms: acerbic, astringent |
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| (adjective) harsh or corrosive in tone | Synonyms: acerbic, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| acerbate | (verb) make sour or bitter | - |
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| (verb) cause to be bitter or resentful | Synonyms: embitter, envenom |
| acerbic | (adjective) sour or bitter in taste | Synonyms: acerb, astringent |
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| (adjective) harsh or corrosive in tone | Synonyms: acerb, acid, acrid, bitter, blistering, caustic, sulfurous, sulphurous, virulent, vitriolic |
| acerbity | (noun) a rough and bitter manner | Synonyms: acrimony, bitterness, jaundice, tartness, thorniness |
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| (noun) a sharp sour taste | Synonyms: tartness |
| (noun) a sharp bitterness | - |
| acerola | (noun) acid red or yellow cherry-like fruit of a tropical American shrub very rich in vitamin C | Synonyms: barbados cherry, surinam cherry, West Indian cherry |
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| (noun) tropical American shrub bearing edible acid red fruit resembling cherries | Synonyms: barbados cherry, Malpighia glabra, Surinam cherry, West Indian cherry |
| acerose | (adjective) narrow and long and pointed; as pine leaves | Synonyms: acerate, acicular, needle-shaped |
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| acervate | (adjective) pertaining to a growth of fungi that forms a heaped-up mass | - |
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| acervulus | (noun) small asexual fruiting body resembling a cushion or blister consisting of a mat of hyphae that is produced on a host by some fungi | - |
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| backspacer | (noun) the typewriter key used for back spacing | Synonyms: backspace, backspace key |
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| bracer | (noun) a tonic or restorative (especially a drink of liquor) | Synonyms: pick-me-up |
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| (noun) a protective covering for the wrist or arm that is used in archery and fencing and other sports | Synonyms: armguard |
| bracero | (noun) a Mexican laborer who worked in the United States on farms and railroads in order to ease labor shortages during World War II | - |
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| exacerbate | (verb) make worse | Synonyms: aggravate, exasperate, worsen |
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| (verb) exasperate or irritate | Synonyms: aggravate, exasperate |
| exacerbating | (adjective) making worse | Synonyms: aggravating, exasperating |
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| exacerbation | (noun) violent and bitter exasperation | - |
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| (noun) action that makes a problem or a disease (or its symptoms) worse | Synonyms: aggravation |
| facer | (noun) (a dated Briticism) a serious difficulty with which one is suddenly faced | - |
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| intracerebral | (adjective) within the brain | - |
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| lacer | (noun) a workman who laces shoes or footballs or books (during binding) | - |
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| lacerate | (adjective) having edges that are jagged from injury | Synonyms: lacerated, mangled, torn |
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| (adjective) irregularly slashed and jagged as if torn | Synonyms: lacerated |
| (verb) cut or tear irregularly | - |
| (verb) deeply hurt the feelings of; distress | - |
| lacerated | (adjective) having edges that are jagged from injury | Synonyms: lacerate, mangled, torn |
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| (adjective) irregularly slashed and jagged as if torn | Synonyms: lacerate |
| laceration | (noun) the act of lacerating | - |
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| (noun) a torn ragged wound | - |
| lacertid | (noun) Old World terrestrial lizard | Synonyms: lacertid lizard |
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| lacertilian | (adjective) of or relating to lizards | Synonyms: saurian |
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| macer | (noun) an official who carries a mace of office | Synonyms: mace, macebearer |
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| macerate | (noun) a macerated substance, sometimes used to infuse vodka with flavor. | - |
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| (verb) soften, usually by steeping in liquid, and cause to disintegrate as a result | - |
| (verb) become soft or separate and disintegrate as a result of excessive soaking | - |
| (verb) cause to grow thin or weak | Synonyms: emaciate, waste |
| (verb) separate into constituents by soaking | - |
| maceration | (noun) extreme leanness (usually caused by starvation or disease) | Synonyms: boniness, bonyness, emaciation, gauntness |
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| (noun) softening due to soaking or steeping | - |
| macerative | (adjective) accompanied by or characterized by maceration | - |
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| pacer | (noun) a horse trained to a special gait in which both feet on one side leave the ground together | - |
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| (noun) a horse used to set the pace in racing | Synonyms: pacemaker, pacesetter |
| placer | (noun) an alluvial deposit that contains particles of some valuable mineral | - |
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| racer | (noun) an animal that races | - |
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| (noun) slender fast-moving North American snakes | - |
| (noun) a fast car that competes in races | Synonyms: race car, racing car |
| (noun) someone who drives racing cars at high speeds | Synonyms: automobile driver, race driver |
| racerunner | (noun) very swift lizard of eastern and central United States | Synonyms: Cnemidophorus sexlineatus, race runner, six-lined racerunner |
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| sacerdotal | (adjective) associated with the priesthood or priests | Synonyms: hieratic, hieratical, priestly |
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| (adjective) of or relating to a belief in sacerdotalism | - |
| sacerdotalism | (noun) a belief that priests can act as mediators between human beings and God | - |
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| tracer | (noun) ammunition whose flight can be observed by a trail of smoke | Synonyms: tracer bullet |
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| (noun) (radiology) any radioactive isotope introduced into the body to study metabolism or other biological processes | - |
| (noun) an instrument used to make tracings | - |
| (noun) an investigator who is employed to find missing persons or missing goods | - |
| tracery | (noun) decoration consisting of an open pattern of interlacing ribs | - |
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