Related by context. Frequent words. (Click for all words.) 57 extinct 49 dinosaur 47 dinosaurs 44 extinct species 44 extinction 43 ape 42 passé 41 apes 41 homo sapiens 40 kaput 40 bye bye 39 vestigial 39 mammals 38 Homo erectus 38 mammal 38 Homo sapiens 38 oblivion 38 alas 37 vogue 37 dustbin 37 pygmy 37 vultures 37 gaga 36 baboon 36 fad 36 wags 36 obsolete 36 passe 36 demise 36 parrot 36 roost 36 lemur 36 anachronism 36 hominid 36 Neanderthals 35 imminent demise 35 lemurs 35 Fred Flintstone 35 albatrosses 35 caveman 35 critically endangered 35 reincarnated 35 hibernation 35 scrap heap 35 crow 35 pygmies 35 roadkill 34 vulture 34 platypus 34 frogs 34 lemmings 34 domesticated 34 tortoise 34 horribly wrong 34 species 34 jackals 34 evolutionary 34 typewriters 34 lizard 34 frog 34 hominids 34 outmoded 34 Homo 34 wag 33 advent 33 trash heap 33 hippopotamus 33 penguin 33 mammoths 33 herbivore 33 decimation 33 woolly mammoth 33 progenitor 33 chimpanzees 33 mongoose 33 parrots 33 pear shaped 32 berserk 32 hyena 32 dino 32 irrelevance 32 hunter gatherer 32 death knell 32 hedgehog 32 carnivorous 32 chipmunk 32 lemming 32 lizards 32 venerable 32 porpoise 32 gorillas 32 evolution 32 hare 32 chimps 32 subspecies 32 sparrow 32 Neanderthal 32 fossilized 32 resurrected 32 robin 32 creature