/ Thesaurus / B Synonyms of brown algae Find synonyms for: Noun1. brown algae, alga, algaeusage: algae having the chlorophyll masked by brown and yellow pigmentsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: grimace Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language