news story vs news article

news story and news article both are nouns.

Word	Noun	Adjective	Verb	Adverb
news story	Yes	No	No	No
news article	Yes	No	No	No

As nouns, news story and news article are synonyms defined as:

Other synonyms of news story include newspaper article.

news story (noun)	news article (noun)
an article reporting news	an article reporting news