world organisation vs international organization

world organisation and international organization both are nouns.

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

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

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

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

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