Dark
Dark adjective - Given to keeping one's activities hidden from public observation or knowledge.
Usage example: the actor was always quite dark about his life before his arrival in Hollywood
Undercover and dark are semantically related. In some cases you can use "Undercover" instead an adjective "Dark".
Undercover
Undercover adjective - Undertaken or done so as to escape being observed or known by others.
Dark and undercover are semantically related. Sometimes you can use "Dark" instead an adjective "Undercover".
Mutual synonyms
Both words in one sentence
- Dark Blue is a cop show about an undercover LAPD unit.It was created by Jerry Bruckheimer.Not to be confused with the Kurt Russell movie of the same name.This series provides examples of: Becoming the Mask As they are undercover, this is a danger.
Source: Series / Dark Blue -
Dark Action Girl: Ellen Brandt is an Extremis-powered soldier who partakes in undercover missions and isn't hesitant to use lethal force.
Source: Film / Iron Man 3 - Dark Is Evil: The outlaw Leroi family dresses all in black, unless they're going undercover.
Cite this Source
Undercover and Dark. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/dark/undercover
Dark & Undercover. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/dark/undercover>.
Undercover or Dark. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/dark/undercover.
Google Ngram Viewer shows how "dark" and "undercover" have occurred on timeline