/ Thesaurus / D Synonyms of doxepin hydrochloride Find synonyms for: Noun1. doxepin, doxepin hydrochloride, Adapin, Sinequan, tricyclic, tricyclic antidepressant, tricyclic antidepressant drugusage: a tricyclic antidepressant (trade names Adapin and Sinequan) with numerous side effects (dry mouth and sedation and gastrointestinal disturbances)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: malady Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language