news organization vs news organisation

news organization and news organisation both are nouns.

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

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

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

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

news organization (noun)	news organisation (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