rack up vs pip

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

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

As verbs, rack up and pip are synonyms defined as:

Other synonyms of rack up include mop up, whip, worst.

rack up (noun)	pip (noun)
	a mark on a die or on a playing card (shape depending on the suit)
	a radar echo displayed so as to show the position of a reflecting surface
	a small hard seed found in some fruits
	a disease of poultry
	a minor nonspecific ailment

rack up (verb)	pip (verb)
supply a rack with feed for (horses or other animals)	defeat thoroughly
defeat thoroughly	hit with a missile from a weapon
gain points in a game	kill by firing a missile
place in a rack