mark up vs price

mark up is not a noun while price is a noun.

Word	Noun	Adjective	Verb	Adverb
mark up	No	No	Yes	No
price	Yes	No	Yes	No

As verbs, price is a hypernym of mark up; that is, price is a word with a broader meaning than mark up:

mark up (noun)	price (noun)
	the property of having material worth (often indicated by the amount of money something would bring if sold)
	the high value or worth of something
	value measured by what must be given or done or undergone to obtain something
	a monetary reward for helping to catch a criminal
	the amount of money needed to purchase something
	cost of bribing someone

mark up (verb)	price (verb)
increase the price of	ascertain or learn the price of
	determine the price of