authoritative vs authorised

authoritative and authorised both are adjectives.

Word	Noun	Adjective	Verb	Adverb
authoritative	No	Yes	No	No
authorised	No	Yes	No	No

As adjectives, authoritative and authorised are synonyms defined as:

Other synonyms of authoritative include authorized.

authoritative (adjective)	authorised (adjective)
endowed with authority	endowed with authority
having authority or ascendancy or influence
of recognized authority or excellence