/ Thesaurus / C Synonyms of carbon cycle Find synonyms for: Noun1. carbon cycle, organic process, biological processusage: the organic circulation of carbon from the atmosphere into organisms and back again2. carbon cycle, thermonuclear reactionusage: a thermonuclear reaction in the interior of starsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: devout Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language