twilight vs eventide

twilight and eventide both are nouns.

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

twilight (noun)	eventide (noun)
the diffused light from the sky when the sun is below the horizon but its rays are refracted by the atmosphere of the earth	the latter part of the day (the period of decreasing daylight from late afternoon until nightfall)
a condition of decline following successes
the time of day immediately following sunset

twilight (adjective)	eventide (adjective)
lighted by or as if by twilight