Answer: cistern

AnswerCrossword Clue
CISTERN

Reservoir.

CISTERN

Rain-storage tank

CISTERN

Well

CISTERN
Underground reservoir
CISTERN
Underground water tank
CISTERNRainwater tank
CISTERNWater-storage tank
CISTERNReservoir
CISTERNSmall reservoir.
CISTERNArtificial reservoir.
CISTERNRain storage tank
CISTERNTank
CISTERNIt may hold water
CISTERNIt'll hold water
CISTERNUnderground tank
CISTERNWater tank
CISTERNWater storer
CISTERNMan-made reservoir
CISTERNWater reservoir
CISTERNRain storage reservoir