Dark
Lightless
Lightless adjective - Being without light or without much light.
Usage example: wondered what might be lurking in the lightless corners of the basement
Mutual synonyms
Both words in one sentence
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In the Star Trek: The Next Generation episode "Where Silence Has Lease", the Enterprise encounters a void in space (home to a curious Eldritch Abomination) which is apparently pure nothingness, but rather than lightless black, it is mostly a cloudy dark blue.
Source: Purple Is the New Black -
What You Are in the Dark: Occurs almost literally to Oscar in the Mile-High Tower — crawling through a lightless tunnel with rats for company.
Source: Literature / Glory Road
Cite this Source
Lightless and Dark. (2016). Retrieved 2026, August 13, from https://thesaurus.plus/related/dark/lightless
Dark & Lightless. N.p., 2016. Web. 13 Aug. 2026. <https://thesaurus.plus/related/dark/lightless>.
Lightless or Dark. 2016. Accessed August 13, 2026. https://thesaurus.plus/related/dark/lightless.
Google Ngram Viewer shows how "dark" and "lightless" have occurred on timeline