As nouns the difference between proclamation and bulletin
is that proclamation is a statement which is proclaimed; a formal public announcement while bulletin is a short report, especially one released through official channels to be broadcast or publicized.
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