Nightbreak is a antonym of daybreak.
As nouns the difference between daybreak and nightbreak
is that daybreak is dawn while nightbreak is the point at which night begins.
daybreak
English
Noun
Dawn.
Synonyms
* break of dawn, break of day, crack of dawn, sunrise
External links
*
nightbreak
English
Noun
(-)
The point at which night begins.
Antonyms
* daybreak
* dawn