story vs bulletin

story and bulletin both are nouns.

Word	Noun	Adjective	Verb	Adverb
story	Yes	No	No	No
bulletin	Yes	No	Yes	No

As nouns, bulletin is a hyponym of story; that is, bulletin is a word with a more specific, narrower meaning than story:

story: a short account of the news
bulletin: a brief report (especially an official statement issued for immediate publication or broadcast)

Other hyponyms of story include newsletter, newssheet, communique, despatch, dispatch, urban legend, exclusive, scoop.

story (noun)	bulletin (noun)
a structure consisting of a room or set of rooms at a single position along a vertical scale	a brief report (especially an official statement issued for immediate publication or broadcast)
a piece of fiction that narrates a chain of related events
a short account of the news
a trivial lie
a message that tells the particulars of an act or occurrence or course of events; presented in writing or drama or cinema or as a radio or television program
a record or narrative description of past events

story (verb)	bulletin (verb)
	make public by bulletin