| affirmer | (noun) someone who claims to speak the truth | Synonyms: asserter, asseverator, avower, declarer |
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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 |
| charmer | (noun) a person who charms others (usually by personal attractiveness) | Synonyms: beguiler |
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| (noun) someone with an assured and ingratiating manner | Synonyms: smoothie, smoothy, sweet talker |
| disarmer | (noun) someone opposed to violence as a means of settling disputes | Synonyms: pacificist, pacifist |
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| dormer | (noun) a gabled extension built out from a sloping roof to accommodate a vertical window | Synonyms: dormer window |
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| farmer | (noun) a person who operates a farm | Synonyms: granger, husbandman, sodbuster |
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| former | (adjective) referring to the first of two things or persons mentioned (or the earlier one or ones of several) | - |
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| (adjective) belonging to the distant past | Synonyms: early, other |
| (adjective) belonging to some prior time | Synonyms: erstwhile, old, one-time, onetime, quondam, sometime |
| (adjective) (used especially of persons) of the immediate past | Synonyms: late, previous |
| (noun) the first of two or the first mentioned of two | - |
| informer | (noun) one who reveals confidential information to the police or other authority | Synonyms: betrayer, blabber, rat, squealer |
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| ormer | (noun) an abalone found near the Channel Islands | Synonyms: Haliotis tuberculata, sea-ear |
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| performer | (noun) an entertainer who performs a dramatic or musical work for an audience | Synonyms: performing artist |
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| reformer | (noun) an apparatus that reforms the molecular structure of hydrocarbons to produce richer fuel | - |
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| (noun) a disputant who advocates reform | Synonyms: crusader, meliorist, reformist, social reformer |
| squirmer | (noun) one who can't stay still (especially a child) | Synonyms: wiggler, wriggler |
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| termer | (noun) a person who serves a specified term | - |
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| transformer | (noun) an electrical device by which alternating current of one voltage is changed to another voltage | - |
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| underperformer | (noun) a business that is less successful than expected | - |
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| (noun) a student who does not perform as well as expected or as well as the IQ indicates | Synonyms: nonachiever, underachiever |
| warmer | (noun) device that heats water or supplies warmth to a room | Synonyms: heater |
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