/ Thesaurus / T Synonyms of thornbill Find synonyms for: Noun1. thornbill, hummingbirdusage: any of various South American hummingbirds with a sharp pointed billWordNet 3.0 Copyright © 2006 by Princeton University. All rights reserved. Related Content Daily Word Quiz: quandary Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language