catchment

noun 0.842

drainage basin

noun 0.774

basin

noun 0.698

sedimentary basin

noun 0.637

canal basin

noun 0.607

cesspit

noun 0.604

soakaway

noun 0.599

reservoir

noun 0.594

basin of attraction

noun 0.582

watershed

noun 0.578

water butt

noun 0.572

washbasin

noun 0.569

cistern

noun 0.567

storm sewer

noun 0.556

cesspool

noun 0.553

drain

noun 0.551

basement

noun 0.549

sump

noun 0.547

drainage

noun 0.543

sump pump

noun 0.542

impluvium

noun 0.541

pudding basin

noun 0.524

carbon sink

noun 0.522

drainer

noun 0.520

drain field

noun 0.513

surface runoff

noun 0.511

drainage pipe

noun 0.511

septic tank

noun 0.511

rain gauge

noun 0.508

water trough

noun 0.504

pumping station

noun 0.502

aquifer

noun 0.502

downspout

noun 0.500