intelligence agent vs secret agent

intelligence agent and secret agent both are nouns.

Word	Noun	Adjective	Verb	Adverb
intelligence agent	Yes	No	No	No
secret agent	Yes	No	No	No

As nouns, intelligence agent and secret agent are synonyms defined as:

intelligence agent and secret agent: a person secretly employed in espionage for a government

Other synonyms of intelligence agent include intelligence officer, operative.

intelligence agent (noun)	secret agent (noun)
a person secretly employed in espionage for a government	a person secretly employed in espionage for a government