| 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 |
| facer | (noun) (a dated Briticism) a serious difficulty with which one is suddenly faced | - |
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| lacer | (noun) a workman who laces shoes or footballs or books (during binding) | - |
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| macer | (noun) an official who carries a mace of office | Synonyms: mace, macebearer |
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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 |
| 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 | - |