news article vs news story

news article and news story both are nouns.

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

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

Other synonyms of news article include newspaper article.

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