dentate leaf vs leafage

dentate leaf and leafage both are nouns.

Word	Noun	Adjective	Verb	Adverb
dentate leaf	Yes	No	No	No
leafage	Yes	No	No	No

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

dentate leaf: a leaf having a toothed margin
leafage: the main organ of photosynthesis and transpiration in higher plants

Other hypernyms of dentate leaf include foliage, leaf.

dentate leaf (noun)	leafage (noun)
a leaf having a toothed margin	the main organ of photosynthesis and transpiration in higher plants