betel vs pepper vine

betel and pepper vine both are nouns.

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

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

betel: Asian pepper plant whose leaves are chewed with betel nut (seed of the betel palm) by southeast Asians
pepper vine: any of various shrubby vines of the genus Piper

Other hypernyms of betel include true pepper.

betel (noun)	pepper vine (noun)
Asian pepper plant whose leaves are chewed with betel nut (seed of the betel palm) by southeast Asians	any of various shrubby vines of the genus Piper
a leaf of a vine from the betel pepper