news agency vs news organisation

news agency and news organisation both are nouns.

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

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

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

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

news agency (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