barn swallow vs Hirundo rustica

barn swallow and Hirundo rustica both are nouns.

Word	Noun	Adjective	Verb	Adverb
barn swallow	Yes	No	No	No
Hirundo rustica	Yes	No	No	No

As nouns, barn swallow and Hirundo rustica are synonyms defined as:

barn swallow and Hirundo rustica: common swallow of North America and Europe that nests in barns etc.

Other synonyms of barn swallow include chimney swallow.

barn swallow (noun)	Hirundo rustica (noun)
common swallow of North America and Europe that nests in barns etc.	common swallow of North America and Europe that nests in barns etc.