riot control operation vs riot control

riot control operation and riot control both are nouns.

Word	Noun	Adjective	Verb	Adverb
riot control operation	Yes	No	No	No
riot control	Yes	No	No	No

As nouns, riot control operation and riot control are synonyms defined as:

riot control operation and riot control: the measures taken to control a riot

riot control operation (noun)	riot control (noun)
the measures taken to control a riot	the measures taken to control a riot