Breadcrumb Home > Thesaurus > C Synonyms of cumulonimbus Find synonyms for: Noun 1. cumulonimbus, cumulonimbus cloud, thundercloud, cloud usage: a dark cloud of great vertical extent charged with electricity; associated with thunderstorms WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of cumulonimbus (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: crepuscular Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language