line up vs wait

line up is not a noun while wait is a noun.

Word	Noun	Adjective	Verb	Adverb
line up	No	No	Yes	No
wait	Yes	No	Yes	No

line up (noun)	wait (noun)
	the act of waiting (remaining inactive in one place while expecting something)
	time during which some action is awaited

line up (verb)	wait (verb)
place in a line or arrange so as to be parallel or straight	look forward to the probable occurrence of
take one's position before a kick-off	serve as a waiter or waitress in a restaurant
arrange in ranks	stay in one place and anticipate or expect something
form a queue, form a line, stand in line	wait before acting
get something or somebody for a specific purpose
form a line