grass finch vs vesper sparrow

grass finch and vesper sparrow both are nouns.

Word	Noun	Adjective	Verb	Adverb
grass finch	Yes	No	No	No
vesper sparrow	Yes	No	No	No

As nouns, grass finch and vesper sparrow are synonyms defined as:

grass finch and vesper sparrow: common North American finch noted for its evening song

Other synonyms of grass finch include Pooecetes gramineus.

grass finch (noun)	vesper sparrow (noun)
usually brightly-colored Australian weaverbirds; often kept as cage birds	common North American finch noted for its evening song
common North American finch noted for its evening song