Related by context. Frequent words. (Click for all words.) 67 pectoral fins 62 theropod 61 canine teeth 60 crocodilians 60 mouthparts 59 razor sharp teeth 58 wattles 57 forelimbs 56 dorsal fins 56 baleen 56 leathery skin 56 porcupine quills 56 carapace 56 bony 55 baleen whales 55 exoskeletons 55 otoliths 55 feathered dinosaurs 55 greenish brown 55 tyrannosaur 55 mandibles 55 tyrannosaurs 54 dorsal fin 54 theropods 54 spiny 54 forelimb 54 scaly skin 54 trilobites 54 Tiktaalik 54 carnivorous dinosaurs 54 Indohyus 54 mandible 53 tetrapods 53 tetrapod 53 sticklebacks 53 fleshy 53 marine invertebrates 53 fins 53 Ardipithecus 53 Nigersaurus 53 pelvic bones 52 scaly 52 sauropods 52 hind limbs 52 bowfin 52 incisors 52 marabou 52 herbivorous 52 collagen fibers 51 sea anemones 51 plesiosaur 51 dentition 51 webbed feet 51 Stegosaurus 51 pterosaur 51 jawbones 51 gobies 51 squids 51 striations 51 H. erectus 51 air sacs 51 fatty tissue 51 hammerhead sharks 51 pelvises 50 zooplankton 50 snout 50 planktonic 50 lizards 50 lobster claws 50 jaw muscles 50 foraminifera 50 tyrannosaurus rex 50 nacre 50 arthropods 50 lobed 50 barnacles 50 billed dinosaur 50 copepods 50 salamanders 49 marine reptiles 49 grayish brown 49 mammals 49 vertebrate 49 beak 49 whalebone 49 arthropod 49 sickle shaped 49 lion mane 49 skink 49 appendages 49 hadrosaur 49 melanosomes 49 soft tissues 49 sea urchins 49 kitchen shears 49 hammerheads 49 mollusks 49 crustaceans 49 filter feeders 49 claws 49 midsections