alluvial

noun 0.784

alluvium

noun 0.742

floodplain

noun 0.737

alluvial fan

noun 0.662

flatlands

noun 0.597

bottomland

noun 0.595

peneplain

noun 0.593

mudflat

noun 0.571

tidal flat

noun 0.552

lowland

noun 0.550

planum

noun 0.548

llano

noun 0.547

pluvial

noun 0.533

prairie

noun 0.526

plain work

noun 0.524

wetland

noun 0.519

fenland

noun 0.518

plainness

noun 0.516

valley

noun 0.516

plainsman

noun 0.514

polder

noun 0.512

blackland

noun 0.505

grassland

noun 0.504

tableland

noun 0.503