As nouns the difference between bulletin and roundup
is that bulletin is a short report, especially one released through official channels to be broadcast or publicized while roundup is an activity in which cattle are herded together in order to be inspected, counted, branded or shipped.
As a verb bulletin
is to announce something by means of such a report or publication.
bulletin
English
Noun
(
en noun)
A short report, especially one released through official channels to be broadcast or publicized
A short news report
A short printed publication, especially one produced by an organization
Derived terms
* bulletin board
Verb
(
en verb)
To announce something by means of such a report or publication
roundup
English
Noun
(
en noun)
An activity in which cattle are herded together in order to be inspected, counted, branded or shipped.
The similar police activity of gathering together suspects to a crime.
The summary to a news bulletin.