intelligence operation vs intelligence activity

intelligence operation and intelligence activity both are nouns.

Word	Noun	Adjective	Verb	Adverb
intelligence operation	Yes	No	No	No
intelligence activity	Yes	No	No	No

As nouns, intelligence operation and intelligence activity are synonyms defined as:

intelligence operation and intelligence activity: the operation of gathering information about an enemy

Other synonyms of intelligence operation include intelligence.

intelligence operation (noun)	intelligence activity (noun)
the operation of gathering information about an enemy	the operation of gathering information about an enemy