sanitization vs sanitisation

sanitization and sanitisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
sanitization	Yes	No	No	No
sanitisation	Yes	No	No	No

As nouns, sanitization and sanitisation are synonyms defined as:

sanitization and sanitisation: making something sanitary (free of germs) as by sterilizing

Other synonyms of sanitization include sanitation.

sanitization (noun)	sanitisation (noun)
making something sanitary (free of germs) as by sterilizing	making something sanitary (free of germs) as by sterilizing