/ Thesaurus / H Synonyms of hirundo nigricans Find synonyms for: Noun1. tree swallow, tree martin, Hirundo nigricans, swallowusage: of Australia and Polynesia; nests in tree cavitiesWordNet 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