Breadcrumb Home > Thesaurus > U Synonyms of underpart Find synonyms for: Noun 1. underpart, body part usage: a part lying on the lower side or underneath an animal's body; "the warbler has a white throat and underparts"; "a woodland mouse with white underparts" WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of underpart (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: anomie Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language