white pepper vs pepper vine

white pepper and pepper vine both are nouns.

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

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

white 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 white pepper include true pepper.

white pepper (noun)	pepper vine (noun)
pepper ground from husked peppercorns	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