night vs twilight

night and twilight both are nouns.

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

As nouns, twilight is a hypernym of night; that is, twilight is a word with a broader meaning than night:

Other hypernyms of night include crepuscle, crepuscule, dusk, evenfall, fall, gloam, gloaming, nightfall.

night (noun)	twilight (noun)
darkness	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 time after sunset and before sunrise while it is dark outside	a condition of decline following successes
a period of ignorance or backwardness or gloom	the time of day immediately following sunset
the dark part of the diurnal cycle considered a time unit
the time between sunset and midnight
the period spent sleeping
a shortening of nightfall

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