global organization vs international organisation

global organization and international organisation both are nouns.

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

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

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

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

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