horseback riding vs get down

horseback riding is a noun but get down is not a noun.

Word	Noun	Adjective	Verb	Adverb
horseback riding	Yes	No	No	No
get down	No	No	Yes	No

horseback riding (noun)	get down (noun)
travel by being carried on horseback
the sport of sitting on the back of a horse while controlling its movements

horseback riding (verb)	get down (verb)
	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