/ Thesaurus / D Synonyms of diphenylbutyl piperidine Find synonyms for: Noun1. diphenylbutyl piperidine, major tranquilizer, major tranquillizer, major tranquilliser, antipsychotic drug, antipsychotic agent, antipsychotic, neuroleptic drug, neuroleptic agent, neurolepticusage: a group of antipsychotic drugs used mainly in the treatment of schizophreniaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language