pull up vs pull-up

pull up is not a noun while pull-up is a noun.

Word	Noun	Adjective	Verb	Adverb
pull up	No	No	Yes	No
pull-up	Yes	No	No	No

pull up (noun)	pull-up (noun)
	an arm exercise performed by pulling yourself up on a horizontal bar until your chin is level with the bar
	a roadside cafe especially for lorry drivers

pull up (verb)	pull-up (verb)
remove, usually with some force or effort; also used in an abstract sense
cause (a vehicle) to stop
come to a halt after driving somewhere
straighten oneself