NATO vs global organization

NATO and global organization both are nouns.

Word	Noun	Adjective	Verb	Adverb
NATO	Yes	No	No	No
global organization	Yes	No	No	No

As nouns, global organization is a hypernym of NATO; that is, global organization is a word with a broader meaning than NATO:

NATO: an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security
global organization: an international alliance involving many different countries

NATO (noun)	global organization (noun)
an international organization created in 1949 by the North Atlantic Treaty for purposes of collective security	an international alliance involving many different countries