advent vs coming

advent and coming both are nouns.

Word	Noun	Adjective	Verb	Adverb
advent	Yes	No	No	No
coming	Yes	Yes	No	No

As nouns, advent and coming are synonyms defined as:

advent and coming: arrival that has been awaited (especially of something momentous)

advent (noun)	coming (noun)
arrival that has been awaited (especially of something momentous)	the moment of most intense pleasure in sexual intercourse
	arrival that has been awaited (especially of something momentous)
	the act of drawing spatially closer to something
	the temporal property of becoming nearer in time

advent (adjective)	coming (adjective)
	of the relatively near future