Breadcrumb Home > Thesaurus Cite Synonyms of butyl Find synonyms for: Noun1. butyl, group, radical, chemical groupusage: a hydrocarbon radical (C4H9)WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.See also: butyl (Dictionary) Related Content Daily Word Quiz: recherch Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language Synonyms Index