horseback riding vs get off

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

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

horseback riding (noun)	get off (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 off (verb)
	escape potentially unpleasant consequences; get away with a forbidden action
	cause to be acquitted; get off the hook; in a legal case
	deliver verbally
	transfer
	get high, stoned, or drugged
	send via the postal service
	alight from (a horse)
	get out of quickly
	leave a vehicle, aircraft, etc.
	enjoy in a sexual way
	be relieved of one's duties temporarily