Mysterious
Mysterious adjective - Being beyond one's powers to know, understand, or explain.
Underground and mysterious are semantically related. In some cases you can use "Underground" instead an adjective "Mysterious".
Nearby Words: mystery, mysteriously
Underground
Underground adjective - Undertaken or done so as to escape being observed or known by others.
Mysterious and underground are semantically related. Sometimes you can use "Mysterious" instead an adjective "Underground".
Mutual synonyms
Related pairs
- deep and mysterious
- deep and underground
- abstruse and mysterious
- abstruse and underground
- secret and mysterious
- secret and underground
- arcane and mysterious
- arcane and underground
- concealed and mysterious
- concealed and underground
- hidden and mysterious
- hidden and underground
- occult and mysterious
- occult and underground
Both words in one sentence
- In the distant future, humanity is all but extinct, driven from the surface of the Earth to underground shelters by mysterious aliens called Triacanto.
Source: Comic Book / Lilith -
The Lost World has now been adapted to serve in even more mysterious places, such as outer space or deep underground.
Source: Lost World -
The video for "The Night" by Disturbed features a security guard inspecting a mysterious, inky black energy present throughout the video while the band plays in an underground parking lot.
Source: Vertical Kidnapping
Cite this Source
Underground and Mysterious. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/mysterious/underground
Mysterious & Underground. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/mysterious/underground>.
Underground or Mysterious. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/mysterious/underground.
Google Ngram Viewer shows how "mysterious" and "underground" have occurred on timeline