Related by context. Frequent words. (Click for all words.) 57 cold climates 55 climates 55 harsh environments 55 climatic conditions 54 tropical climates 53 corrosive environments 52 unforgiving terrain 51 terrains 51 inhospitable terrain 51 arid lands 50 colder climates 50 mountainous terrain 50 harshest environments 49 temperature extremes 49 topographies 49 harsh winters 48 fertile soils 47 temperate climates 47 forbidding terrain 47 environments 47 drained soils 46 cold winters 46 temperate zones 46 semi arid regions 46 alkaline soil 46 mountainous regions 46 aridity 45 rough terrain 45 arid 45 arid desert 45 deserts 44 semi arid 44 prolonged droughts 44 subtropical regions 44 ecologies 44 lowlands 44 soils 44 warm climates 44 subtropical climate 44 drylands 44 micro climates 44 arid regions 44 temperate forests 44 temperate regions 44 frequent droughts 44 sandy soils 43 climes 43 Polar Regions 43 Migrating birds 43 warmer drier 43 tropics 42 microclimate 42 microclimates 42 temperate climate 42 subtropics 42 cooler climates 42 Succulents 42 altitudes 42 semiarid 42 inhospitable 42 warmer climates 42 climatically 42 rugged terrain 42 frigid winters 41 ambient temperatures 41 uneven terrain 41 sandy soil 41 subarctic 41 Drip irrigation 41 thick jungles 41 ruggedised 40 escarpments 40 hilly terrain 40 privations 40 fungal spores 40 tropical 39 hunger thirst 39 Severe drought 39 Sahelian 39 chiggers 39 treacherous terrain 39 desiccation 39 temperate 39 sensor nodes 39 conditions 39 earthquakes floods 39 winters 39 acacias 39 herbaceous plants 39 colder winters 39 dense forests 39 snowy winters 39 freeze thaw cycles 39 mosquito infested 39 scarcities 39 latitudes 38 discomforts 38 protective clothing 38 milder winters 38 arable lands 38 adaptable