/ Thesaurus / B Synonyms of bone ash Find synonyms for: Noun1. bone ash, ashusage: ash left when bones burn; high in calcium phosphate; used as fertilizer and in bone chinaWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: sumptuous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language