Cavern. ++++ More often, just Cave - and the adjective "underground" is superfluous by noun's definition.
Below ground
crypt...textropolis
Subway
aquifer
inground
Superb is another word for excellent. Superb is another word for excellent.
Nilavara = underground cell of house
Another word for shake is "Tremble".
subterranean
aquifer
Crypt.
Crypt.
A Den. Cave. Underground lair
Souterrain Souterrain
Another word for the focus is the EPICENTRE (or if you are American the EPICENTER!) Of course the epicentre and focus are different in that one is on the ground and the focus is underground.
masking, screening, covering, going underground, veiling, suppressing, cloaking, out of sight, concealing.
By defintion, a tunnel is underground.
Yes, in the word "underground," "under-" is the prefix, "ground" is the root word, and there is no suffix.
U N D to create the word 'underground' (UNDergroUND)
Underground is a 11 letter word starting with U and ending with D.