hospitalization vs hospitalisation

hospitalization and hospitalisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
hospitalization	Yes	No	No	No
hospitalisation	Yes	No	No	No

As nouns, hospitalization and hospitalisation are synonyms defined as:

hospitalization and hospitalisation: placing in medical care in a hospital

Other synonyms of hospitalization include hospital care.

hospitalization (noun)	hospitalisation (noun)
placing in medical care in a hospital	placing in medical care in a hospital
insurance that pays all or part of a patient's hospital expense
the condition of being treated as a patient in a hospital
a period of time when you are confined to a hospital