Cave-in underground Synonyms

We can't find synonyms for the phrase "Cave-in underground", but we have synonyms for terms, you can combine them.

Cave-in Synonyms

CU abbreviation

CU is an abbreviation for Cave-in Underground

What does CU stand for?

CU stands for "Cave-in Underground"

Definitions for Underground

(adjective) undertaken or done so as to escape being observed or known by others
(adjective) being, situated, or operating beneath the surface of the earth
(noun) a secret organization in a conquered country fighting against enemy forces