Mutual synonyms
Both words in one sentence
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Hoover has a woman locked in a dark chamber which slowly fills with water, and is told her daughter is in another similar chamber (she's not).
Source: Drowning Pit -
Supplementary material for Star Trek: Nemesis indicates that the Remans evolved on the dark side of tidally locked Remus, explaining their photosensitivity.
Source: Tidally Locked Planet -
In Jedi Knight: Dark Forces II, there is a locked door that Kyle cannot open at all, even with a lightsaber.
Source: Locked Door
Cite this Source
Locked and Dark. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/dark/locked
Dark & Locked. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/dark/locked>.
Locked or Dark. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/dark/locked.
Google Ngram Viewer shows how "dark" and "locked" have occurred on timeline