daytime vs twenty-four hour period

daytime and twenty-four hour period both are nouns.

Word	Noun	Adjective	Verb	Adverb
daytime	Yes	No	No	No
twenty-four hour period	Yes	No	No	No

daytime (noun)	twenty-four hour period (noun)
the time after sunrise and before sunset while it is light outside	time for Earth to make a complete rotation on its axis