/ Thesaurus / H Synonyms of half hardy Find synonyms for: Adjective1. half-hardy, robust (vs. frail)usage: (of plants) requiring protection from frost; "half-hardy annuals"WordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: dispel Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language