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KEY: Pest.

SYN: Plague, nuisance, curse, annoyance, blight, bone, scourge.

ANT: Benefit, blessing, acquisition.

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KEY: Pester.

SYN: Plague, worry, vex, harass, disquiet, annoy, tease, torment, chafe, harry, badger, incommode, gall.

ANT: Treat, regale, amuse, refresh, gratify, soothe.

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KEY: Pestiferous.