Related by context. Frequent words. (Click for all words.) 72 existed 67 exists 52 existence 50 belong 49 operate 48 arise 47 disappear 44 occur 44 reside 44 persist 43 thrive 43 there 42 happen 41 lie 40 recognize 39 mean 39 materialize 39 inherent 39 occurring 38 these 37 flourish 37 constitute 37 imply 37 resemble 37 apply 36 do 36 pose 36 possess 36 anymore 36 require 35 are 35 emerge 35 not 35 represent 34 functioning 34 such 34 feasible 34 evolve 34 appear 34 operates 34 pretend 34 present 34 govern 34 create 34 created 34 happening 34 linger 33 viable 33 seem 33 mention 33 survive 33 dominate 33 ours 33 occupy 33 unlike 33 boast 33 remain 33 explicitly 33 readily available 33 foresee 32 diminish 32 have 32 prevalent 32 distinguish 32 those 32 indeed 32 originated 31 threaten 31 confined 31 existing 31 involve 31 true 31 deteriorate 31 acknowledge 31 explored 31 there'sa 31 know 31 kinds 31 humans 31 live 30 indicate 30 disappearing 30 rife 30 tolerate 30 bother 30 thriving 30 living 30 anywhere else 30 differ 30 violate 30 There 30 plague 30 human beings 30 come 30 solved 30 invented 30 arises 30 even 30 include 30 vary 30 worsen