global organization vs international organization

global organization and international organization both are nouns.

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

As nouns, global organization and international organization are synonyms defined as:

global organization and international organization: an international alliance involving many different countries

Other synonyms of global organization include international organisation, world organisation, world organization.

global organization (noun)	international organization (noun)
an international alliance involving many different countries	an international alliance involving many different countries