intelligence officer vs secret agent

intelligence officer and secret agent both are nouns.

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

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

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

Other synonyms of intelligence officer include intelligence agent, operative.

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