leaf vs crenate leaf

leaf and crenate leaf both are nouns.

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

As nouns, crenate leaf is a hyponym of leaf; that is, crenate leaf is a word with a more specific, narrower meaning than leaf:

leaf (noun)	crenate leaf (noun)
hinged or detachable flat section (as of a table or door)	a leaf having a scalloped margin
a sheet of any written or printed material (especially in a manuscript or book)
the main organ of photosynthesis and transpiration in higher plants

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