Covert
Covert adjective - Undertaken or done so as to escape being observed or known by others.
Usage example: a covert operation to provide aid to the rebels
Underground is a synonym for covert in secret topic. In some cases you can use "Underground" instead the word "Covert" as an adjective or a noun, when it comes to topics like undercover. popular alternative
Underground
Underground adjective - Undertaken or done so as to escape being observed or known by others.
Usage example: an underground operation to smuggle ancient artifacts out of the country
Covert is a synonym for underground in secret topic. You can use "Covert" instead the word "Underground" as an adjective or a noun, if it concerns topics such as clandestine. popular alternative
Mutual synonyms
Related pairs
- subterranean and covert
- subterranean and underground
- buried and covert
- buried and underground
- private and covert
- private and underground
- privy and covert
- privy and underground
- secret and covert
- secret and underground
- concealed and covert
- concealed and underground
- hidden and covert
- hidden and underground
Both words in one sentence
- The involved parties may or may not be unknown to muggles as well, but the central concept of the trope is that the conflict itself is somehow hidden, covert or underground.
Source: Secret War -
Covert Group with Mundane Front: The Wildfire biological research installation is buried underground, below a legitimate Department of Agriculture research facility that's studying corn crops.
- The Archduchy still succumbs to a (bloodier) Anschluss, though underground Habsburg cells thwart the Nazis with the covert help of Erwin Rommel.
Source: Alternate History / Web Original
Cite this Source
Underground and Covert. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/covert/underground
Covert & Underground. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/covert/underground>.
Underground or Covert. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/covert/underground.
Google Ngram Viewer shows how "covert" and "underground" have occurred on timeline