Supreme Allied Commander Europe vs SACEUR

Supreme Allied Commander Europe and SACEUR both are nouns.

Word	Noun	Adjective	Verb	Adverb
Supreme Allied Commander Europe	Yes	No	No	No
SACEUR	Yes	No	No	No

As nouns, Supreme Allied Commander Europe and SACEUR are synonyms defined as:

Supreme Allied Commander Europe and SACEUR: commanding officer of ACE; NATO's senior military commander in Europe

Supreme Allied Commander Europe (noun)	SACEUR (noun)
commanding officer of ACE; NATO's senior military commander in Europe	commanding officer of ACE; NATO's senior military commander in Europe