/ Thesaurus / D Synonyms of devonian period Find synonyms for: Noun1. Devonian, Devonian period, Age of Fishesusage: from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonitesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: heifer Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language