/ Thesaurus / P Synonyms of phase in Find synonyms for: Verb1. phase in, introduce, innovateusage: introduce graduallyWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: opulent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language