intelligence vs intelligence activity

intelligence and intelligence activity both are nouns.

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

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

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

Other synonyms of intelligence include intelligence operation.

intelligence (noun)	intelligence activity (noun)
the operation of gathering information about an enemy	the operation of gathering information about an enemy
the ability to comprehend; to understand and profit from experience
information about recent and important events
secret information about an enemy (or potential enemy)
a unit responsible for gathering and interpreting information about an enemy