authorisation vs authorization

authorisation and authorization both are nouns.

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

As nouns, authorisation and authorization are synonyms defined as:

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

Other synonyms of authorisation include empowerment.

As nouns, authorisation and authorization are synonyms defined as:

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

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

As nouns, authorisation and authorization are synonyms defined as:

Other synonyms of authorisation include authority, sanction.

As nouns, authorisation and authorization are synonyms defined as:

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

Other synonyms of authorisation include mandate.

authorisation (noun)	authorization (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