/ Thesaurus / M Synonyms of manganese tetroxide Find synonyms for: Noun1. manganese tetroxide, compound, chemical compoundusage: an oxide of manganese found naturally as hausmanniteWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: jugular Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language