meeting vs summit

meeting and summit both are nouns.

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

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

meeting (noun)	summit (noun)
the social act of assembling for some common purpose	a meeting of heads of governments
the act of joining together as one	the top or extreme point of something (usually a mountain or hill)
a casual or unexpected convergence	the highest level or degree attainable; the highest stage of development
a formally arranged gathering
a small informal social gathering
a place where things merge or flow together (especially rivers)

meeting (verb)	summit (verb)
	reach the summit (of a mountain)