pip vs rack up

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

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

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

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

pip (noun)	rack up (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

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