/ Thesaurus / G Synonyms of growth factor Find synonyms for: Noun1. growth factor, proteinusage: a protein that is involved in cell differentiation and growthWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: inutiae Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language