fool vs use up

fool is a noun but use up is not a noun.

Word	Noun	Adjective	Verb	Adverb
fool	Yes	No	Yes	No
use up	No	No	Yes	No

fool (noun)	use up (noun)
a person who lacks good judgment
a person who is gullible and easy to take advantage of
a professional clown employed to entertain a king or nobleman in the Middle Ages

fool (verb)	use up (verb)
indulge in horseplay	use up (resources or materials)
fool or hoax	require (time or space)
spend frivolously and unwisely
make a fool or dupe of