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. Hanukkah Origins of the Christmas Holiday Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 Krampus: The Christmas Devil Kwanzaa ✖ Related Content Daily Word Quiz: tintinnabulation Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language