immobilizing vs immobilization

immobilizing and immobilization both are nouns.

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

As nouns, immobilizing and immobilization are synonyms defined as:

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

Other synonyms of immobilizing include immobilisation.

immobilizing (noun)	immobilization (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