betel vs leaf

betel and leaf both are nouns.

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

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

Other hypernyms of betel include foliage, leafage.

betel (noun)	leaf (noun)
Asian pepper plant whose leaves are chewed with betel nut (seed of the betel palm) by southeast Asians	hinged or detachable flat section (as of a table or door)
a leaf of a vine from the betel pepper	a sheet of any written or printed material (especially in a manuscript or book)
	the main organ of photosynthesis and transpiration in higher plants

betel (verb)	leaf (verb)
	produce leaves, of plants
	turn over pages
	look through a book or other written material