/ Thesaurus / S Synonyms of scientific theory Find synonyms for: Noun1. scientific theory, theoryusage: a theory that explains scientific observations; "scientific theories must be falsifiable"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: effervescent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language