Mawson, C.O.S., ed. (1870–1938). Roget’s International Thesaurus. 1922.

Class VI. Words Relating to the Sentient and Moral Powers
Section IV. Moral Affections
2. Moral Sentiments

936. Detractor.

   NOUN:DETRACTOR, reprover; censor, censurer; cynic, critic, caviler, carper, word-catcher, frondeur [F.], barracker [dial. Eng. & Austral.].
  defamer, knocker [colloq., U. S.], backbiter, slanderer, Sir Benjamin Backbite, lampooner, satirist, traducer, libeler, calumniator, dearest foe, Thersites; Zoilus; good-natured friend [satirical]; reviler, vituperator, castigator; shrew [See Irascibility]; muckraker.
  DISAPPROVER, laudator temporis acti [Horace].
   ADJECTIVE:black-mouthed, abusive [See Detraction].
  1. You know who the critics are?—the men who have failed in literature and art.—Disraeli
  2. Oh, you chorus of indolent reviewers!—Tennyson