Apios americana vs potato bean

Apios americana and potato bean both are nouns.

Word	Noun	Adjective	Verb	Adverb
Apios americana	Yes	No	No	No
potato bean	Yes	No	No	No

As nouns, Apios americana and potato bean are synonyms defined as:

Apios americana and potato bean: a North American vine with fragrant blossoms and edible tubers; important food crop of Native Americans

Other synonyms of Apios americana include Apios tuberosa, groundnut, groundnut vine, Indian potato, wild bean.

Apios americana (noun)	potato bean (noun)
a North American vine with fragrant blossoms and edible tubers; important food crop of Native Americans	nutlike tuber; important food of Native Americans
	a North American vine with fragrant blossoms and edible tubers; important food crop of Native Americans
	twining plant of Amazon basin having large edible roots