Topside and Underside

Topside

Topside noun - (usually plural) weather deck; the part of a ship's hull that is above the waterline.
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Synonyms for Topside

Underside is an antonym for topside.

Underside

Underside noun - The side or part facing downward from something.

Topside is an antonym for underside in topics: bottom, lower side.
Cite this Source
Underside and Topside. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/topside/underside
Topside & Underside. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/topside/underside>.
Underside or Topside. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/topside/underside.
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