Lightless and Unilluminated

Lightless

Lightless adjective - Without illumination.
Usage example: came up the lightless stairs

Unilluminated is a synonym for lightless in dark topic. In some cases you can use "Unilluminated" instead an adjective "Lightless", when it comes to topics like cloudy, darkish, dark-hued. popular alternative

Unilluminated

Unilluminated adjective - Without illumination.
Usage example: the unilluminated side of Mars

Lightless is a synonym for unilluminated in dark topic. You can use "Lightless" instead an adjective "Unilluminated", if it concerns topics such as cloudy, darkish, dark-hued. popular alternative
Cite this Source
Unilluminated and Lightless. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/lightless/unilluminated
Lightless & Unilluminated. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/lightless/unilluminated>.
Unilluminated or Lightless. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/lightless/unilluminated.
Google Ngram Viewer shows how "lightless" and "unilluminated" have occurred on timeline