daylight vs mean solar day

daylight and mean solar day both are nouns.

Word	Noun	Adjective	Verb	Adverb
daylight	Yes	No	No	No
mean solar day	Yes	No	No	No

daylight (noun)	mean solar day (noun)
light during the daytime	time for Earth to make a complete rotation on its axis
the time after sunrise and before sunset while it is light outside