Nounmoat; fosse; trench; ditch · underground air-raid shelter; dugout

Nounouter moat (of a castle)

Nouninner moat; moat within the castle walls

Nountrench; dugout

Nouncover trench

Nounwater jump (on a racetrack, etc.) · moat (around a castle, etc.)

Nounair-raid shelter; bomb shelter

Nounbomb shelter; dugout; trench

Nounbunker; shelter

Nounbunker; covered trench; dugout