get up vs hike

get up is not a noun while hike is a noun.

Word	Noun	Adjective	Verb	Adverb
get up	No	No	Yes	No
hike	Yes	No	Yes	No

As verbs, hike is a hyponym of get up; that is, hike is a word with a more specific, narrower meaning than get up:

get up (noun)	hike (noun)
	a long walk usually for exercise or pleasure
	the amount a salary is increased
	an increase in cost

get up (verb)	hike (verb)
get up and out of bed	walk a long way, as for pleasure or physical exercise
cause to rise	increase
put on special clothes to appear particularly appealing and attractive
develop
study intensively, as before an exam
arrange by systematic planning and united effort
raise from a lower to a higher position
rise to one's feet