/ Thesaurus / K Synonyms of kavrin Find synonyms for: Noun1. papaverine, Kavrin, muscle relaxantusage: an alkaloid medicine (trade name Kavrin) obtained from opium; used to relax smooth muscles; it is nonaddictiveWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: immense Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language