psyop vs military operation

psyop and military operation both are nouns.

Word	Noun	Adjective	Verb	Adverb
psyop	Yes	No	No	No
military operation	Yes	No	No	No

As nouns, military operation is a hypernym of psyop; that is, military operation is a word with a broader meaning than psyop:

psyop: military actions designed to influence the perceptions and attitudes of individuals, groups, and foreign governments
military operation: activity by a military or naval force (as a maneuver or campaign)

Other hypernyms of psyop include operation.

psyop (noun)	military operation (noun)
military actions designed to influence the perceptions and attitudes of individuals, groups, and foreign governments	activity by a military or naval force (as a maneuver or campaign)