federal agent vs official

federal agent and official both are nouns.

Word	Noun	Adjective	Verb	Adverb
federal agent	Yes	No	No	No
official	Yes	Yes	No	No

As nouns, official is a hypernym of federal agent; that is, official is a word with a broader meaning than federal agent:

Other hypernyms of federal agent include functionary.

federal agent (noun)	official (noun)
any agent or representative of a federal agency or bureau	someone who administers the rules of a game or sport
	a worker who holds or is invested with an office

federal agent (adjective)	official (adjective)
	having official authority or sanction
	of or relating to an office
	verified officially
	(of a church) given official status as a national or state institution
	conforming to set usage, procedure, or discipline