/ Thesaurus / H Synonyms of hydrogen carbonate Find synonyms for: Noun1. bicarbonate, hydrogen carbonate, carbonateusage: a salt of carbonic acid (containing the anion HCO3) in which one hydrogen atom has been replaced; an acid carbonateWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: reticent Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language