Deep
Sea
Sea noun - The whole body of salt water that covers nearly three-fourths of the earth.
Usage example: millions of plants and animals live in the sea
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Synonyms for Sea
Deep is a synonym for sea in ocean topic. You can use "Deep" instead a noun "Sea", if it concerns topics such as large mass. literary substitute
Both words in one sentence
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Kraken and Leviathan: The monster is a humongous deep-sea octopoid with possibly hundreds of man-eating tentacles, and is large enough to just fit into the ocean liner's main hall.
Source: Film / Deep Rising - When Tia Dalma once again becomes the sea goddess Calypso in Pirates of the Caribbean: At World's End, her voice grows extremely deep and reverbed.
Source: Power Makes Your Voice Deep -
Lampshaded in that Cyborg was quite adamant about it being built for deep-sea, not deep-space.
Source: Western Animation / Teen Titans
Cite this Source
Sea and Deep. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/deep/sea
Deep & Sea. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/deep/sea>.
Sea or Deep. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/deep/sea.
Google Ngram Viewer shows how "deep" and "sea" have occurred on timeline