potato tree vs Solanum crispum

potato tree and Solanum crispum both are nouns.

Word	Noun	Adjective	Verb	Adverb
potato tree	Yes	No	No	No
Solanum crispum	Yes	No	No	No

As nouns, potato tree and Solanum crispum are synonyms defined as:

potato tree and Solanum crispum: hardy climbing shrub of Chile grown as an ornamental for its fragrant flowers; not a true potato

potato tree (noun)	Solanum crispum (noun)
hardy climbing shrub of Chile grown as an ornamental for its fragrant flowers; not a true potato	hardy climbing shrub of Chile grown as an ornamental for its fragrant flowers; not a true potato
South American shrub or small tree widely cultivated in the tropics; not a true potato