authorisation vs law

authorisation and law both are nouns.

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

authorisation (noun)	law (noun)
the act of conferring legality or sanction or formal warrant	the learned profession that is mastered by graduate study in a law school and that is responsible for the judicial system
the power or right to give orders or make decisions	a rule or body of rules of conduct inherent in human nature and essential to or binding upon human society
official permission or approval	a generalization that describes recurring facts or events in nature
a document giving an official instruction or command	the branch of philosophy concerned with the law and the principles that lead courts to make the decisions they do
	legal document setting forth rules governing a particular kind of activity
	the collection of rules imposed by authority
	the force of policemen and officers