Underground boat Synonyms

Underground replaced

experimental boat

mysterious boat

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

UB abbreviation

UB is an abbreviation for Underground Boat

What does UB stand for?

UB stands for "Underground Boat"

Boat replaced

underground plane

underground ship

underground journey

Definitions for Boat

(noun) a small buoyant structure for travel on water
(noun) a large craft for travel by water
(verb) to travel on water in a vessel