/ Thesaurus / T Synonyms of theory based Find synonyms for: Adjective1. theory-based, theoretical (vs. empirical), theoreticusage: based in theory rather than experiment; "theory-based arguments and positions"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: magnanimous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language