brown creeper vs Certhia americana

brown creeper and Certhia americana both are nouns.

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

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

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

Other synonyms of brown creeper include American creeper.

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