wild pumpkin vs gourd vine

wild pumpkin and gourd vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
wild pumpkin	Yes	No	No	No
gourd vine	Yes	No	No	No

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

wild pumpkin: perennial vine of dry parts of central and southwestern United States and Mexico having small hard mottled green inedible fruit
gourd vine: any vine of the family Cucurbitaceae that bears fruits with hard rinds

Other hypernyms of wild pumpkin include gourd.

wild pumpkin (noun)	gourd vine (noun)
perennial vine of dry parts of central and southwestern United States and Mexico having small hard mottled green inedible fruit	any vine of the family Cucurbitaceae that bears fruits with hard rinds