authorization vs authorisation

authorization and authorisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
authorization	Yes	No	No	No
authorisation	Yes	No	No	No

As nouns, authorization and authorisation are synonyms defined as:

authorization and authorisation: the act of conferring legality or sanction or formal warrant

Other synonyms of authorization include empowerment.

As nouns, authorization and authorisation are synonyms defined as:

authorization and authorisation: the power or right to give orders or make decisions

Other synonyms of authorization include authority, dominance, potency, say-so.

As nouns, authorization and authorisation are synonyms defined as:

Other synonyms of authorization include authority, sanction.

As nouns, authorization and authorisation are synonyms defined as:

authorization and authorisation: a document giving an official instruction or command

Other synonyms of authorization include mandate.

authorization (noun)	authorisation (noun)
the act of conferring legality or sanction or formal warrant	the act of conferring legality or sanction or formal warrant
the power or right to give orders or make decisions	the power or right to give orders or make decisions
official permission or approval	official permission or approval
a document giving an official instruction or command	a document giving an official instruction or command