rack up vs have

rack up is not a noun while have is a noun.

Word	Noun	Adjective	Verb	Adverb
rack up	No	No	Yes	No
have	Yes	No	Yes	No

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

Other hyponyms of rack up include par, shoot, convert, homer, kick, eagle, hole up, ace, walk, equalise, equalize, get even, get, make.

rack up (noun)	have (noun)
	a person who possesses great material wealth

rack up (verb)	have (verb)
supply a rack with feed for (horses or other animals)	cause to be born
defeat thoroughly	suffer from; be ill with
gain points in a game	undergo (as of injuries and illnesses)
place in a rack	cause to move; cause to be in a certain position or condition
	undergo
	cause to do; cause to act in a specified manner
	serve oneself to, or consume regularly
	have sex with; archaic use
	organize or be responsible for
	go through (mental or physical states or experiences)
	have or possess, either in a concrete or an abstract sense
	achieve a point or goal
	get something; come into possession of
	have ownership or possession of
	receive willingly something given or offered
	have a personal or business relationship with someone
	have as a feature
	be confronted with