crenellate vs crenel

crenellate is not a noun while crenel is a noun.

Word	Noun	Adjective	Verb	Adverb
crenellate	No	No	Yes	No
crenel	Yes	No	Yes	No

As verbs, crenellate and crenel are synonyms defined as:

Other synonyms of crenellate include crenelate.

crenellate (noun)	crenel (noun)
	a notch or open space between two merlons in a crenelated battlement
	one of a series of rounded projections (or the notches between them) formed by curves along an edge (as the edge of a leaf or piece of cloth or the margin of a shell or a shriveled red blood cell observed in a hypertonic solution etc.)

crenellate (verb)	crenel (verb)
supply with battlements	supply with battlements