power structure vs administration

power structure and administration both are nouns.

Word	Noun	Adjective	Verb	Adverb
power structure	Yes	No	No	No
administration	Yes	No	No	No

power structure (noun)	administration (noun)
the organization of people at different ranks in an administrative body	a method of tending to or managing the affairs of some group of people (especially the group's business affairs)
	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