Synonyms and related words :
arrogant, clannish, cliquish, condescending, contemptuous, contumelious, disdainful, exclusive, haughty, high-hat, patronizing, potty, priggish, scornful, sneering, sniffy, snippy, snobbish, snobby, snotty, supercilious, toploftical, toplofty, withering