Indian potato vs groundnut vine

Indian potato and groundnut vine both are nouns.

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

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

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

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

Indian potato (noun)	groundnut vine (noun)
very tall American perennial of central and the eastern United States to Canada having edible tuberous roots	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