crystallisation vs crystallization

crystallisation and crystallization both are nouns.

Word	Noun	Adjective	Verb	Adverb
crystallisation	Yes	No	No	No
crystallization	Yes	No	No	No

As nouns, crystallisation and crystallization are synonyms defined as:

Other synonyms of crystallisation include crystallizing.

crystallisation (noun)	crystallization (noun)
the formation of crystals	a mental synthesis that becomes fixed or concrete by a process resembling crystal formation
	a rock formed by the solidification of a substance; has regularly repeating internal structure; external plane faces
	the formation of crystals