serrate leaf vs leafage

serrate leaf and leafage both are nouns.

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

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

serrate leaf: a leaf having a margin notched like a saw with teeth pointing toward the apex
leafage: the main organ of photosynthesis and transpiration in higher plants

Other hypernyms of serrate leaf include foliage, leaf.

serrate leaf (noun)	leafage (noun)
a leaf having a margin notched like a saw with teeth pointing toward the apex	the main organ of photosynthesis and transpiration in higher plants