SACEUR vs commandant

SACEUR and commandant both are nouns.

Word	Noun	Adjective	Verb	Adverb
SACEUR	Yes	No	No	No
commandant	Yes	No	No	No

As nouns, commandant is a hypernym of SACEUR; that is, commandant is a word with a broader meaning than SACEUR:

SACEUR: commanding officer of ACE; NATO's senior military commander in Europe
commandant: an officer in command of a military unit

Other hypernyms of SACEUR include commander, commanding officer.

SACEUR (noun)	commandant (noun)
commanding officer of ACE; NATO's senior military commander in Europe	an officer in command of a military unit