news organisation vs news organization

news organisation and news organization both are nouns.

Word	Noun	Adjective	Verb	Adverb
news organisation	Yes	No	No	No
news organization	Yes	No	No	No

As nouns, news organisation and news organization are synonyms defined as:

news organisation and news organization: an agency to collects news reports for newspapers and distributes it electronically

Other synonyms of news organisation include news agency, press agency, press association, wire service.

news organisation (noun)	news organization (noun)
an agency to collects news reports for newspapers and distributes it electronically	an agency to collects news reports for newspapers and distributes it electronically