dismount vs come down

dismount is a noun but come down is not a noun.

Word	Noun	Adjective	Verb	Adverb
dismount	Yes	No	Yes	No
come down	No	No	Yes	No

As verbs, come down is a hypernym of dismount; that is, come down is a word with a broader meaning than dismount:

Other hypernyms of dismount include descend, fall, go down.

dismount (noun)	come down (noun)
the act of dismounting (a horse or bike etc.)

dismount (verb)	come down (verb)
alight from (a horse)	get sick
	be the essential element
	criticize or reprimand harshly
	move downward and lower, but not necessarily all the way
	fall from clouds