/ Thesaurus / H Synonyms of haem Find synonyms for: Noun1. heme, haem, hematin, haemitin, protoheme, pigmentusage: a complex red organic pigment containing iron and other atoms to which oxygen bindsWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: spectral Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language