Breadcrumb Home > Thesaurus > U Synonyms of undersoil Find synonyms for: Noun 1. subsoil, undersoil, soil, dirt usage: the layer of soil between the topsoil and bedrock WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of undersoil (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Chinese New Year History, Meaning, and Celebrations Current Events This Week: February 2024 Valentine's Day Valentine's Day History Mardi Gras 30 "Charlie and the Chocolate Factory" Quotes ✖ Related Content Daily Word Quiz: felicitous Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language