Certhia americana vs brown creeper

Certhia americana and brown creeper both are nouns.

Word	Noun	Adjective	Verb	Adverb
Certhia americana	Yes	No	No	No
brown creeper	Yes	No	No	No

As nouns, Certhia americana and brown creeper are synonyms defined as:

Certhia americana and brown creeper: a common creeper in North America with a down-curved bill

Other synonyms of Certhia americana include American creeper.

Certhia americana (noun)	brown creeper (noun)
a common creeper in North America with a down-curved bill	a common creeper in North America with a down-curved bill