/ Thesaurus / I Synonyms of in a beastly manner Find synonyms for: Adverb1. bestially, brutishly, in a beastly mannerusage: in an inhumane manner; "she treated her husband bestially"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language