Red Cross vs NGO

Red Cross and NGO both are nouns.

Word	Noun	Adjective	Verb	Adverb
Red Cross	Yes	No	No	No
NGO	Yes	No	No	No

As nouns, NGO is a hypernym of Red Cross; that is, NGO is a word with a broader meaning than Red Cross:

Red Cross: an international organization that cares for the sick or wounded or homeless in wartime
NGO: an organization that is not part of the local or state or federal government

Other hypernyms of Red Cross include nongovernmental organization.

Red Cross (noun)	NGO (noun)
an international organization that cares for the sick or wounded or homeless in wartime	an organization that is not part of the local or state or federal government