pluvial

noun 0.627

plunge pool

noun 0.572

atrium

noun 0.562

plughole

noun 0.547

sump

noun 0.546

nymphaeum

noun 0.545

indusium

noun 0.543

catchment basin

noun 0.541

lavabo

noun 0.530

soakaway

noun 0.529

aqueduct

noun 0.524

aquifer

noun 0.516

pluming

noun 0.515

hydria

noun 0.514

plinth

noun 0.513

plumb

noun 0.506

rainwater

noun 0.504

drainage basin

noun 0.502

infundibulum

noun 0.502

cesspool

noun 0.500