One who detracts from another's merit or reputation by uttering things to his prejudice; a person given to detraction; a defamer, traducer…

A detractor, traducer, or slanderer.

With the. With plural agreement: hateful people or things collectively. Also occasionally as a count noun: a hateful person or thing.

= obtrectator, n.

A person who disparages something or someone, esp. in aggressive and insulting language; a reviler.

One who derogates; one who diminishes or takes from the authority of anything.

One who or that which diminishes or lessens.

One who disparages or discredits; one who speaks slightingly of, or belittles; a detractor.

A person who disparages or makes defamatory statements about another; a detractor; a calumniator. Obsolete. rare.

A person who, or agency which diminishes or disparages. Obsolete.

One who undervalues or esteems too lightly; a depreciator.

One who decries.

= detractor, n. 1. Cf. substractor, n. 1. rare.

One who extenuates. One who depreciates or makes light of. Obsolete.

A person who shouts or screams. Chiefly with adverbs in later use. Now rare.

One who depreciates.

one who vilipends.

A person who dismisses the importance of another person or thing; a depreciator.

A person who spreads hatred, esp. one who promotes hostility and prejudice toward a particular group, faith, etc.