Synonyms and related words :
ass-kissing, backscratching, bootlicking, brown-nosing, cringing, fawnery, fawning, flunkyism, footlicking, groveling, handshaking, ingratiation, insinuation, mealymouthedness, obeisance, obsequiousness, parasitism, prostration, sponging, sycophancy, timeserving, toadeating, toadying, toadyism, truckling, tufthunting