balsam apple vs gourd vine

balsam apple and gourd vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
balsam apple	Yes	No	No	No
gourd vine	Yes	No	No	No

As nouns, gourd vine is a hypernym of balsam apple; that is, gourd vine is a word with a broader meaning than balsam apple:

balsam apple: a tropical Old World flowering vine with red or orange warty fruit
gourd vine: any vine of the family Cucurbitaceae that bears fruits with hard rinds

Other hypernyms of balsam apple include gourd.

balsam apple (noun)	gourd vine (noun)
a tropical Old World flowering vine with red or orange warty fruit	any vine of the family Cucurbitaceae that bears fruits with hard rinds