world organisation vs international organisation

world organisation and international organisation both are nouns.

Word	Noun	Adjective	Verb	Adverb
world organisation	Yes	No	No	No
international organisation	Yes	No	No	No

As nouns, world organisation and international organisation are synonyms defined as:

world organisation and international organisation: an international alliance involving many different countries

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

world organisation (noun)	international organisation (noun)
an international alliance involving many different countries	an international alliance involving many different countries