SACLANT vs commanding officer

SACLANT and commanding officer both are nouns.

Word	Noun	Adjective	Verb	Adverb
SACLANT	Yes	No	No	No
commanding officer	Yes	No	No	No

As nouns, commanding officer is a hypernym of SACLANT; that is, commanding officer is a word with a broader meaning than SACLANT:

SACLANT: commanding officer of ACLANT; a general of the United States Army nominated by the President of the United States and approved by the North Atlantic Council
commanding officer: an officer in command of a military unit

Other hypernyms of SACLANT include commandant, commander.

SACLANT (noun)	commanding officer (noun)
commanding officer of ACLANT; a general of the United States Army nominated by the President of the United States and approved by the North Atlantic Council	an officer in command of a military unit