NATO vs Allied Command Atlantic

NATO and Allied Command Atlantic both are nouns.

Word	Noun	Adjective	Verb	Adverb
NATO	Yes	No	No	No
Allied Command Atlantic	Yes	No	No	No

NATO (noun)	Allied Command Atlantic (noun)
an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security	a major strategic headquarters of NATO located in the United States; is under the authority of the North Atlantic Council