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

935. Flatterer.

   NOUN:FLATTERER, adulator, eulogist, euphemist; optimist, encomiast, laudator, booster [colloq., U. S.], whitewasher.
  toady, toadeater, sycophant, courtier, flattercap [obs. or dial. Eng.], pickthank [archaic or dial.], Damocles, Sir Pertinax MacSycophant; flatteur [F.], prôneur [F.]; puffer, claqueur [F.], claquer; tout, touter [both colloq.], claw-back [obs. or dial. Eng.], slaverer; doer of dirty work; parasite, hanger-on (servility) [See Servility].
   ADJECTIVE:flattering [See Flattery].
  1. Pessimum genus inimicorum laudantes.—Tacitus
  2. But when I tell him he hates flatterers, He says he does, being then most flattered.—Julius Cæsar