Underground drill Synonyms

Underground replaced

revolutionary drill

mysterious drill

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

UD abbreviation

UD is an abbreviation for Underground Drill

What does UD stand for?

UD stands for "Underground Drill"

Drill replaced

underground train

underground hole

underground form

underground routine

underground burrow

Definitions for Drill

(noun) an established and often automatic or monotonous series of actions followed when engaging in some activity
(noun) something done over and over in order to develop skill
(verb) to make a hole or series of holes in