Breadcrumb Home > Thesaurus > F Synonyms of feldspar Find synonyms for: Noun1. feldspar, felspar, sparusage: any of a group of hard crystalline minerals that consist of aluminum silicates of potassium or sodium or calcium or bariumWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved.Definition and meaning of feldspar (Dictionary) ✖ Related Content Daily Word Quiz: donnybrook Analogy of the Day: Today’s Analogy Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language