foliage vs leafage

foliage and leafage both are nouns.

Word	Noun	Adjective	Verb	Adverb
foliage	Yes	No	No	No
leafage	Yes	No	No	No

As nouns, foliage and leafage are synonyms defined as:

foliage and leafage: the main organ of photosynthesis and transpiration in higher plants

Other synonyms of foliage include leaf.

foliage (noun)	leafage (noun)
(architecture) leaf-like architectural ornament	the main organ of photosynthesis and transpiration in higher plants
the main organ of photosynthesis and transpiration in higher plants