Related by context. Frequent words. (Click for all words.) 56 artesian 54 temperate rainforest 51 aquifer 51 bioregion 51 shallow aquifer 50 biodiversity hotspot 49 Ogallala aquifer 49 aquifers 49 underground aquifer 48 headwaters 48 limestone caves 48 magma chamber 48 volcanic crater 48 artesian wells 48 Reverse osmosis 48 Aquifers 47 fiord 47 Hetch Hetchy Reservoir 47 basin 46 volcanic cones 46 underground aquifers 46 reservoir 46 alluvial soil 46 melting glacier 46 mudflat 46 escarpments 46 embayment 46 limestone cave 46 limestone formations 46 water 46 reverse osmosis desalination 45 headwater 45 Waiwera 45 desalinated 45 fiords 45 lush rainforest 45 gasfields 45 Raton Basin 45 rugged cliffs 45 navigable rivers 45 Namib Desert 45 reservoirs 45 geologic formation 44 nonrenewable resource 44 moraine 44 silts 44 sandstone formations 44 seabeds 44 inter tidal 44 #sq km [001] 44 Selkirk Mountains 44 recirculates 44 biodiverse 44 hot springs 44 alluvial deposits 44 peninsula jutting 44 groundwater extraction 44 absorbs carbon dioxide 44 groundwater aquifers 44 undrained 43 misty mountains 43 evergreen forests 43 lava tube 43 basalt 43 groundwater 43 groundwater basin 43 fumaroles 43 volcanic peaks 43 calcareous 43 extinct volcano 43 #sq km [003] 43 Aquifer 43 hydro electric dams 43 arid climates 42 freshwater 42 majestic scenery 42 tailing ponds 42 treated effluent 42 unspoiled beauty 42 hydro dams 42 Geologically 42 extinct volcanoes 42 Great Artesian Basin 42 aquifer recharge 42 Bakken shale formation 42 subglacial 42 coulees 42 cenote 42 escarpment 42 waterfall 42 fertile soils 42 streambanks 42 seepages 42 sand dredged 42 marl 42 rocky outcrops 42 oceanic crust 42 basins 41 Escarpment 41 lakebed 41 deltaic