evenfall vs nightfall

evenfall and nightfall both are nouns.

Word	Noun	Adjective	Verb	Adverb
evenfall	Yes	No	No	No
nightfall	Yes	No	No	No

As nouns, evenfall and nightfall are synonyms defined as:

Other synonyms of evenfall include crepuscle, crepuscule, dusk, fall, gloam, gloaming, twilight.

evenfall (noun)	nightfall (noun)
the time of day immediately following sunset	the time of day immediately following sunset