authorised vs authoritative

authorised and authoritative both are adjectives.

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

As adjectives, authorised and authoritative are synonyms defined as:

Other synonyms of authorised include authorized.

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