Clandestine
Clandestine adjective - Undertaken or done so as to escape being observed or known by others.
Illegal and clandestine are semantically related. In some cases you can use "Illegal" instead an adjective "Clandestine".
Illegal
Illegal adjective - Contrary to or forbidden by law.
Clandestine and illegal are semantically related. Sometimes you can use "Clandestine" instead an adjective "Illegal".
Nearby Words: illegality, illegally
Both words in one sentence
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Judgment Six (J6), the grouping of major corporations behind the worldwide tournaments in the Virtua Fighter series, is responsible for assassinations, blackmail, white-collar theft, and illegal, clandestine Super Soldier projects, among others.
Source: And Your Little Dog, Too! -
Plus, while 47 performs rather indiscriminate hits, Parchezzi works for the Franchise, a clandestine government group with the goal of keeping human cloning illegal so that nobody else may benefit from it.
Source: Evil Counterpart / Video Games
Cite this Source
Illegal and Clandestine. (2016). Retrieved 2026, August 01, from https://thesaurus.plus/related/clandestine/illegal
Clandestine & Illegal. N.p., 2016. Web. 01 Aug. 2026. <https://thesaurus.plus/related/clandestine/illegal>.
Illegal or Clandestine. 2016. Accessed August 01, 2026. https://thesaurus.plus/related/clandestine/illegal.
Google Ngram Viewer shows how "clandestine" and "illegal" have occurred on timeline