Humulus americanus vs American hop

Humulus americanus and American hop both are nouns.

Word	Noun	Adjective	Verb	Adverb
Humulus americanus	Yes	No	No	No
American hop	Yes	No	No	No

As nouns, Humulus americanus and American hop are synonyms defined as:

Humulus americanus and American hop: native American plant sometimes confused with the European hop

Humulus americanus (noun)	American hop (noun)
native American plant sometimes confused with the European hop	native American plant sometimes confused with the European hop