immobilisation vs immobilizing

immobilisation and immobilizing both are nouns.

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

As nouns, immobilisation and immobilizing are synonyms defined as:

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

Other synonyms of immobilisation include immobilization.

immobilisation (noun)	immobilizing (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