betel leaf vs betel

betel leaf and betel both are nouns.

Word	Noun	Adjective	Verb	Adverb
betel leaf	Yes	No	No	No
betel	Yes	No	No	No

As nouns, betel leaf and betel are synonyms defined as:

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