Breadcrumb Home > Thesaurus > M Synonyms of marl Find synonyms for: Noun 1. marl, soil, dirt usage: a loose and crumbling earthy deposit consisting mainly of calcite or dolomite; used as a fertilizer for soils deficient in lime WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of marl (Dictionary) ✖ Related Content Daily Word Quiz: derogate Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language