daylight vs eventide

daylight and eventide both are nouns.

Word	Noun	Adjective	Verb	Adverb
daylight	Yes	No	No	No
eventide	Yes	No	No	No

As nouns, eventide is a hyponym of daylight; that is, eventide is a word with a more specific, narrower meaning than daylight:

daylight: the time after sunrise and before sunset while it is light outside
eventide: the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)

Other hyponyms of daylight include afternoon, midafternoon, eve, even, evening.

daylight (noun)	eventide (noun)
light during the daytime	the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)
the time after sunrise and before sunset while it is light outside