/ Thesaurus / Y Synonyms of yellow giant hyssop Find synonyms for: Noun1. yellow giant hyssop, Agastache nepetoides, giant hyssopusage: erect perennial with stout stems and yellow-green flowers; southern Canada and southeastern United StatesWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: ontiguous Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language