What is another word for "sycophant"?

Roget's Thesaurus (1911) lists these synonyms for "sycophant": adulator, archtraitor, bad, barrator, betrayer, blackguard, claqueur, clawback, clothing, conspirator, courtier, dirty, doer, earwig, encomiast, eulogist, flaneur, flatterer, genus, grass, hanger-on, knave, laudator, man, mischief-maker, optimist, parasite, pet, puffer, rascal, recreant, renegade, reptile, rogue, serpent, servility, shyster, snake, sneak, squealer.