catch some Z's vs dream

catch some Z's is not a noun while dream is a noun.

Word	Noun	Adjective	Verb	Adverb
catch some Z's	No	No	Yes	No
dream	Yes	No	Yes	No

catch some Z's (noun)	dream (noun)
	a series of mental images and emotions occurring during sleep
	imaginative thoughts indulged in while awake
	a fantastic but vain hope (from fantasies induced by the opium pipe)
	a state of mind characterized by abstraction and release from reality
	a cherished desire
	someone or something wonderful

catch some Z's (verb)	dream (verb)
be asleep	have a daydream; indulge in a fantasy
	experience while sleeping