Breadcrumb Home > Thesaurus > U Synonyms of underworld Find synonyms for: Noun 1. underworld, class, stratum, social class, socio-economic class usage: the criminal class 2. Hell, Hades, infernal region, netherworld, Scheol, underworld, imaginary place, mythical place, fictitious place usage: (religion) the world of the dead; "No one goes to Hades with all his immense wealth"-Theognis WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of underworld (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: quisling Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language