black pepper vs pepper vine

black pepper and pepper vine both are nouns.

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

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

black pepper: climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam
pepper vine: any of various shrubby vines of the genus Piper

Other hypernyms of black pepper include true pepper.

black pepper (noun)	pepper vine (noun)
pepper that is ground from whole peppercorns with husks on	any of various shrubby vines of the genus Piper
climber having dark red berries (peppercorns) when fully ripe; southern India and Sri Lanka; naturalized in northern Burma and Assam