daytime vs twenty-four hours

daytime and twenty-four hours both are nouns.

Word	Noun	Adjective	Verb	Adverb
daytime	Yes	No	No	No
twenty-four hours	Yes	No	No	No

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