subterranean

Modifies a noun

• depths--like: Listening, he suddenly heard a far, rushing sound from subterranean depths--like a load of coal being put in--then a frightened cry.
• lair: The Twilight Kingdom attempts the latter approach, with Shindler using the confined environment of Koth's subterranean lair to hide hidden horror within.
• aquifer: No ancient site is ever found built on such subterranean aquifers.
• cavern: It includes three stages in which you have to fight your way through the passages of alien subterranean caverns.
• labyrinth: Born in 1863, it has grown into a vast subterranean labyrinth with even vaster tentacles stretching out over the surface of the Earth.
• clover: Spring annuals such as the interestingly named subterranean clover are common.

Modifying Another Word

• partly: A partly subterranean dome about 10 meters in diameter, similar to the hogan of the Navajo, was the uniform shelter.
• mainly: When extended the body tapers markedly toward the front end consistent with the mainly subterranean habits of these animals.
• so: There are actually 40 or so subterranean settlements in the area although only a few are open to the public.