summit meeting vs summit

summit meeting and summit both are nouns.

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

As nouns, summit meeting and summit are synonyms defined as:

summit meeting (noun)	summit (noun)
a meeting of heads of governments	a meeting of heads of governments
	the top or extreme point of something (usually a mountain or hill)
	the highest level or degree attainable; the highest stage of development

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