/ Thesaurus / I Synonyms of iron carbide Find synonyms for: Noun1. cementite, iron carbide, compound, chemical compoundusage: a chemical compound that is a constituent of steel and cast iron; very hard and brittleWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: acquiesce Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language