Related by context. Frequent words. (Click for all words.) 43 magma chamber 42 aquifers 42 freshwater 42 supernatural creatures 41 seabeds 41 reservoir 41 Sinkholes 41 Salinity 41 Floridan Aquifer 41 Ogallala Aquifer 40 watercourse 40 streambeds 40 underground aquifers 40 caverns 40 underground caverns 40 aquatic organisms 39 hydrological cycle 39 icecaps 39 geological formations 39 aquifer 39 marine sediments 39 Sediment 39 glacial melt 39 streambed 39 aridity 39 snow melt 39 geologic formations 39 snowmelt 38 headwaters 38 aquifer recharge 38 waterholes 38 Sediments 38 reservoirs 38 Judean Desert 38 Snake 38 Weddell Sea 37 underground aquifer 37 Pestilence 37 Devil 37 subterranean 37 geologic formation 37 headwater 37 Dead Sea 37 Creek tributary 37 upstream reservoirs 37 Athabasca River 36 mineral salts 36 biota 36 lakebed 36 waterbody 36 sediment 36 Cave 36 Lake Kinneret 36 Serpents 36 burrows 36 Horned 36 barrens 36 Faerie 36 caves 35 meltwater 35 hydrologic 35 groundwater pumping 35 aquatic habitat 35 permafrost 35 seawater 35 riverbeds 35 freshwater wetlands 35 Serpent 35 creatures 35 lake 35 water 35 Aquifer 35 River basin 35 creeks rivers 35 stalagmites 35 Swamps 35 cavern 34 peridotite 34 Hasankeyf 34 salinity 34 bottomlands 34 ledges 34 river deltas 34 Parched 34 groundwater basin 34 semiarid 34 river basins 34 brines 34 Edwards Aquifer 34 lava tube 34 arroyos 34 brackish 34 Forgotten Dreams 34 stalactites 34 subsurface 34 coastal estuaries 34 injection wells 34 evaporation ponds 34 middens 34 magmatic 34 groundwater