Black
Black noun - A time or place of little or no light.
Usage example: a serial killer who always did his evil deeds in the black of night
Day
Day noun - The hours of light between one night and the next.
Usage example: during the day, we like to go play ball in the park
Nearby Word: daytime
Both words in one sentence
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For a very common (and far more mundane) example, many, if not most, things that people use day-to-day are effectively black boxes.
Source: Black Box - One day, while he and his girlfriend are on holiday in Jamaica, he is standing at a urinal, when a black Jamaican man walks up next to him.
Source: Black Is Bigger in Bed - Black Shirts are closet Evil Minions yearning for the day the villain brings about his Empire of Evil.
Source: Black Shirt
Cite this Source
Day and Black. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/black/day
Black & Day. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/black/day>.
Day or Black. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/black/day.
Google Ngram Viewer shows how "black" and "day" have occurred on timeline