/ Thesaurus / S Synonyms of sylvine Find synonyms for: Noun1. sylvite, sylvine, mineralusage: a mineral consisting of native potassium chloride; an important ore of potassium that is found in sedimentary bedsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: kiln Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language