KEY: Proficient \n.\
SYN: Adept, master, expert.
ANT: Tyro, novice, ignoramus, dunce.
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KEY: Proficient \a.\
SYN: Expert, clever, practised, skilled, trained, versed, advanced, conversant, skilful, competent, well qualified.
ANT: backward, ignorant, unskilled, inconversant, ill-versed, awkward, clumsy.
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KEY: Profit.
SYN: Gain, emolument, advantage, avail, acquisition, benefit service, use, improvement.