dismount vs get down

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

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

As verbs, dismount and get down are synonyms defined as:

Other synonyms of dismount include get off, light, unhorse.

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

dismount (verb)	get down (verb)
alight from (a horse)	take the first step or steps in carrying out an action
	put down in writing; of texts, musical compositions, etc.
	pass through the esophagus as part of eating or drinking
	lower someone's spirits; make downhearted
	move something or somebody to a lower position
	alight from (a horse)
	lower (one's body) as by kneeling