/ Thesaurus / H Synonyms of horseradish peroxidase Find synonyms for: Noun1. horseradish peroxidase, peroxidaseusage: an enzyme used in immunohistochemistry to label antigens and their antibodiesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: pudgy Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language