immobilization vs immobilisation

immobilization and immobilisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
immobilization	Yes	No	No	No
immobilisation	Yes	No	No	No

As nouns, immobilization and immobilisation are synonyms defined as:

immobilization and immobilisation: the act of limiting movement or making incapable of movement

Other synonyms of immobilization include immobilizing.

As nouns, immobilization and immobilisation are synonyms defined as:

immobilization and immobilisation: fixation (as by a plaster cast) of a body part in order to promote proper healing

immobilization (noun)	immobilisation (noun)
the act of limiting movement or making incapable of movement	the act of limiting movement or making incapable of movement
fixation (as by a plaster cast) of a body part in order to promote proper healing	fixation (as by a plaster cast) of a body part in order to promote proper healing