administration vs authorities

administration and authorities both are nouns.

Word	Noun	Adjective	Verb	Adverb
administration	Yes	No	No	No
authorities	Yes	No	No	No

administration (noun)	authorities (noun)
a method of tending to or managing the affairs of some group of people (especially the group's business affairs)	the organization that is the governing authority of a political unit
the act of administering medication
the act of meting out justice according to the law
the act of governing; exercising authority
the persons (or committees or departments etc.) who make up a body for the purpose of administering something
the tenure of a president