KEY: Detractor.
SYN: Slanderer, cynic, backbiter.
ANT: Flatterer, sycophant, eulogist.
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KEY: Detriment.
SYN: Loss, harm, hurt, injury, deterioration, impairment, disadvantage, prejudice, damage, inconvenience.
ANT: Enhancement, improvement, remedy, reinstatement, repair, augmentation.
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KEY: Detrimental.
SYN: Injurious, hurtful, pernicious.