forum vs meeting

forum and meeting both are nouns.

Word	Noun	Adjective	Verb	Adverb
forum	Yes	No	No	No
meeting	Yes	No	No	No

As nouns, meeting is a hypernym of forum; that is, meeting is a word with a broader meaning than forum:

Other hypernyms of forum include group meeting.

forum (noun)	meeting (noun)
a public facility to meet for open discussion	the social act of assembling for some common purpose
a public meeting or assembly for open discussion	the act of joining together as one
	a casual or unexpected convergence
	a formally arranged gathering
	a small informal social gathering
	a place where things merge or flow together (especially rivers)