swallow hole Definition

sinkhole, kettle hole, natural depression, doline, diaclasis, pothole, subsidence, scrobiculate, swallet, geological phenomenon, cenote, camouflet, alluvial fan, geological fault, cavern, diluvium, catchdrain, landslide, sentine, hole, cesspipe, fissure, cave in, graffage, drainage, cave, fossor, suspiral, flood, landslip, mudslide, fossula, cavernicolous, landflood, escarp, collapse, rimose, stave in, traphole, floodage, trogue, incaverned, stillicide, silt up, geological process, contrafissure, cunette, lithophyse, stulm, seepage, manhole, geosynclinal, culvert, calcivorous, remblai, trench, volcanic crater, sink, plutonism, fault plane, water gang, crevasse, ravine, chasm, coalhole, syrtic, downthrow, draintile, demersion, crevice, drainage ditch, lisne, fossulate, topsoiling, ginging, excavation, gurge, crater, karst, bradyseism, stone pit, air shaft, excavate, gully, water joint, ouze, gullywasher, brim over, fire trench, atterrate, corrasion, levee, submerge, batardeau, plutonist, fluviometer, quicksand, rockslide, erosion, stylolite,