/ Thesaurus / E Synonyms of efficaciously Find synonyms for: Adverb1. efficaciously, effectivelyusage: in an effective manner; "these are real problems that can be dealt with most effectively by rational discussion"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: fabricate Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language