Deep
Vast
Vast adjective - Unusually large.
Mutual synonyms
Both words in one sentence
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Cauldron Lake itself is far more deep and vast than it appears, as a deep sea fishing trawler has somehow found a way to its suspiciously oceanic depths.
Source: Eldritch Location -
In the Star Trek: Rihannsu series, the Romulan/Rihannsu colony world Ysail is famed for its vast Saijja Caverns, a network of caves so vast and deep that they cannot be accurately scanned from orbit and have never been mapped.
Source: Beneath the Earth -
Children of an Elder God:The story stars out when a team of spelunkers met an Eldritch Abomination while they were exploring a vast network of deep, unexplored caverns.
Source: Dug Too Deep
Cite this Source
Vast and Deep. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deep/vast
Deep & Vast. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deep/vast>.
Vast or Deep. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deep/vast.
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