Hirundo nigricans vs tree martin

Hirundo nigricans and tree martin both are nouns.

Word	Noun	Adjective	Verb	Adverb
Hirundo nigricans	Yes	No	No	No
tree martin	Yes	No	No	No

As nouns, Hirundo nigricans and tree martin are synonyms defined as:

Hirundo nigricans and tree martin: of Australia and Polynesia; nests in tree cavities

Other synonyms of Hirundo nigricans include tree swallow.

Hirundo nigricans (noun)	tree martin (noun)
of Australia and Polynesia; nests in tree cavities	of Australia and Polynesia; nests in tree cavities