Breadcrumb Home > Thesaurus > C Synonyms of carboniferous Find synonyms for: Noun 1. Carboniferous, Carboniferous period usage: from 345 million to 280 million years ago Adjective 1. carboniferous usage: of or relating to the Carboniferous geologic era; "carboniferous rock system" 2. carbonaceous, carbonous, carbonic, carboniferous usage: relating to or consisting of or yielding carbon WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of carboniferous (Dictionary) TrendingHere are the facts and trivia that people are buzzing about. Jewish Holidays, 2010-2030 (A.M. 5770-5791) Western Christian Holidays, 2010-2030 12 Steps to a New Year New Year's Resolution to Slim Down? Martin Luther King Speeches Books of the Bible: Old Testament Books in Order ✖ Related Content Daily Word Quiz: agitprop Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language