Cucumis melo vs melon vine

Cucumis melo and melon vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
Cucumis melo	Yes	No	No	No
melon vine	Yes	No	No	No

As nouns, melon vine is a hypernym of Cucumis melo; that is, melon vine is a word with a broader meaning than Cucumis melo:

Cucumis melo: any of several varieties of vine whose fruit has a netted rind and edible flesh and a musky smell
melon vine: any of various fruit of cucurbitaceous vines including: muskmelons, watermelons, cantaloupes, cucumbers

Other hypernyms of Cucumis melo include melon.

Cucumis melo (noun)	melon vine (noun)
any of several varieties of vine whose fruit has a netted rind and edible flesh and a musky smell	any of various fruit of cucurbitaceous vines including: muskmelons, watermelons, cantaloupes, cucumbers