/ Thesaurus / B Synonyms of brown coal Find synonyms for: Noun1. lignite, brown coal, wood coal, coal, humateusage: intermediate between peat and bituminous coalWordNet 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