get down vs horseback riding

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

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

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

get down (verb)	horseback riding (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