Breadcrumb Home > Thesaurus > O Synonyms of overgrowth Find synonyms for: Noun 1. giantism, gigantism, overgrowth, hypertrophy usage: excessive size; usually caused by excessive secretion of growth hormone from the pituitary gland 2. overgrowth, profusion, profuseness, richness, cornucopia usage: a profusion of growth on or over something else WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of overgrowth (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: antecedent Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language