crenate leaf vs foliage

crenate leaf and foliage both are nouns.

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

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

crenate leaf: a leaf having a scalloped margin
foliage: the main organ of photosynthesis and transpiration in higher plants

Other hypernyms of crenate leaf include leaf, leafage.

crenate leaf (noun)	foliage (noun)
a leaf having a scalloped margin	(architecture) leaf-like architectural ornament
	the main organ of photosynthesis and transpiration in higher plants