myelinisation vs myelinization

myelinisation and myelinization both are nouns.

Word	Noun	Adjective	Verb	Adverb
myelinisation	Yes	No	No	No
myelinization	Yes	No	No	No

As nouns, myelinisation and myelinization are synonyms defined as:

myelinisation and myelinization: the development of a myelin sheath around a nerve fiber

myelinisation (noun)	myelinization (noun)
the development of a myelin sheath around a nerve fiber	the development of a myelin sheath around a nerve fiber