coming vs run-up

coming and run-up both are nouns.

Word	Noun	Adjective	Verb	Adverb
coming	Yes	Yes	No	No
run-up	Yes	No	No	No

As nouns, run-up is a hyponym of coming; that is, run-up is a word with a more specific, narrower meaning than coming:

Other hyponyms of coming include access, closing, closure, landing approach.

coming (noun)	run-up (noun)
the moment of most intense pleasure in sexual intercourse	the approach run during which an athlete gathers speed
arrival that has been awaited (especially of something momentous)	a substantial increase over a relatively short period of time
the act of drawing spatially closer to something
the temporal property of becoming nearer in time

coming (adjective)	run-up (adjective)
of the relatively near future