As nouns the difference between summit and rally
is that
summit is (countable) a peak; the top of a mountain while
rally is a demonstration; an event where people gather together to protest for or against a given cause or
rally can be good-humoured raillery.
As verbs the difference between summit and rally
is that
summit is (transitive|hiking|climbing|colloquial) to reach the summit of a mountain while
rally is to collect, and reduce to order, as troops dispersed or thrown into confusion; to gather again; to reunite or
rally can be to tease; to chaff good-humouredly.