/ Thesaurus / C Synonyms of cambrian period Find synonyms for: Noun1. Cambrian, Cambrian periodusage: from 544 million to about 500 million years ago; marine invertebratesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: mongrel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language