Related by context. Frequent words. (Click for all words.) 68 pterosaurs 67 pterosaur 61 feathered dinosaurs 61 Archaeopteryx 60 theropod 59 dinosaurs 59 mammals 59 pterodactyls 58 marine reptiles 58 tyrannosaurus rex 58 mammal 57 Diplodocus 57 crocodilians 57 marine reptile 57 flightless birds 57 T. rex 56 toothed whales 56 Allosaurus 56 platypuses 55 Tyrannosaurus Rex 55 giant tortoise 55 Jurassic Period 55 flightless 55 Brachiosaurus 55 carnivorous dinosaurs 55 Tyrannosaurus rex 55 T rex 54 cassowary 54 Octopuses 54 dinos 54 Tyrannosaurus 54 Nigersaurus 54 forelimbs 54 vertebrates 53 tyrannosaur 53 Giant squid 53 tyrannosaurs 53 velociraptor 53 Indohyus 53 velociraptors 53 hadrosaur 53 colossal squid 53 trilobites 53 prehistoric creatures 53 reptiles 53 creatures 53 Tasmanian tiger 53 vertebrate 53 theropods 53 leatherback turtle 52 sauropods 52 Velociraptor 52 lizards 52 plesiosaur 52 pterodactyl 52 Mammoths 52 wingspans 52 dinosaur 52 Sperm whales 52 arachnids 52 coelacanth 52 dragonflies 51 arthropods 51 emperor penguin 51 Ardipithecus ramidus 51 sauropod 51 Komodo dragons 51 flightless bird 51 fossilized remains 51 megafauna 51 Fruit flies 51 Cretaceous Period 51 melanogaster 50 tetrapods 50 Giant Squid 50 dragonfly 50 mantis shrimp 50 Triceratops 50 brontosaurus 50 clouded leopards 50 giant squid 50 Whale sharks 50 Dragonflies 50 marsupials 49 bumble bees 49 Stegosaurus 49 dinosaur skeletons 49 Extinct 49 T. Rex 49 genus Homo 49 creature 49 wingless 49 sea anemones 49 pectoral fins 49 giant tortoises 49 spiders 49 Dinosaurs 49 Mammals 49 lungfish 49 Ardipithecus 49 marine invertebrates