lateralization vs lateralisation

lateralization and lateralisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
lateralization	Yes	No	No	No
lateralisation	Yes	No	No	No

As nouns, lateralization and lateralisation are synonyms defined as:

lateralization and lateralisation: localization of function on either the right or left sides of the brain

Other synonyms of lateralization include laterality.

lateralization (noun)	lateralisation (noun)
localization of function on either the right or left sides of the brain	localization of function on either the right or left sides of the brain