pepper vine vs vine

pepper vine and vine both are nouns.

Word	Noun	Adjective	Verb	Adverb
pepper vine	Yes	No	No	No
vine	Yes	No	No	No

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

pepper vine: any of various shrubby vines of the genus Piper
vine: a plant with a weak stem that derives support from climbing, twining, or creeping along a surface

pepper vine (noun)	vine (noun)
any of various shrubby vines of the genus Piper	a plant with a weak stem that derives support from climbing, twining, or creeping along a surface