potato bean vs groundnut vine

potato bean and groundnut vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
potato bean	Yes	No	No	No
groundnut vine	Yes	No	No	No

As nouns, potato bean and groundnut vine are synonyms defined as:

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

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

potato bean (noun)	groundnut vine (noun)
nutlike tuber; important food of Native Americans	a North American vine with fragrant blossoms and edible tubers; important food crop 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