Related by context. Frequent words. (Click for all words.) 53 depression 50 ruts 48 landforms 47 indentations 47 discontinuities 46 recessions 46 sinkholes 46 gullies 46 troughs 45 Depression 44 landmasses 44 freeze thaw cycles 44 craters 44 eddies 44 furrows 44 undulations 43 hollows 43 stalagmites 43 deformations 43 famines 43 rock outcrops 43 Great Moderation 43 puddling 43 El Ninos 43 swales 42 calcite 42 tuffs 42 ponding 42 devastations 42 traumas 42 subsidence 42 subduction zones 42 cavities 42 Recessions 42 river valleys 42 perturbations 42 glaciation 42 Sinkholes 41 downswings 41 talus 41 drainage basins 41 vortices 40 saturated soils 40 canker sores 40 alluvium 40 whorls 40 Little Ice Age 40 striations 40 deformation 40 headlands 40 valleys 40 silty 40 crevices 40 Great Depression 40 nutrient deficiencies 40 ridges 40 compacted soil 40 swellings 40 terrors 40 crustal 39 granitic 39 sloughs 39 erosions 39 erosive 39 abscesses 39 wetness 39 clefts 39 bubbles 39 caldera 39 basalt 39 mossy 39 earth tremors 39 depressive episodes 39 algal blooms 39 bulges 39 hormonal imbalances 39 lithosphere 39 inflations 39 manias 39 pebbly 39 rainstorms 39 soil erosion 39 crests 38 vortexes 38 oscillation 38 mud puddles 38 floodings 38 basalts 38 furrow 38 deteriorations 38 lava flows 38 granite boulders 38 volcanism 38 root rot 38 landslips 38 mounding 38 meltwater 38 crevasses 38 fluvial 38 upswings 38 rocky outcrops