At sea
At sea adjective - Perplexed by many conflicting situations or statements; filled with bewilderment.
Invisible
Invisible adjective - Not readily seen or noticed.
At sea and invisible are semantically related. Sometimes you can use "At sea" instead an adjective "Invisible".
Nearby Words: invisibly, invisibility
Both terms in one sentence
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The sub has an experimental ducted tunnel drive, which allows it to run more quietly than any other ship at sea; effectively making it nigh-invisible to sonar detection.
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The sub has an experimental magnetohydrodynamic propulsion system (more easily referred to as Caterpillar Drive), which allows it to run more quietly than any other ship at sea; effectively making it nigh-invisible to SONAR detection.
Source: Film / The Hunt for Red October
Cite this Source
Invisible and At sea. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/at_sea/invisible
At sea & Invisible. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/at_sea/invisible>.
Invisible or At sea. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/at_sea/invisible.
Google Ngram Viewer shows how "at sea" and "invisible" have occurred on timeline