crenellation vs crenellate

crenellation is a noun but crenellate is not a noun.

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

crenellation (noun)	crenellate (noun)
the action of constructing ramparts with gaps for firing guns or arrows
a rampart built around the top of a castle with regular gaps for firing arrows or guns

crenellation (verb)	crenellate (verb)
	supply with battlements