Dinosaurs share some characteristis with crocodiles. Actually crocodiles have changed little over the last 200 million years.
They share some characteristics such as cold-blooded circulation (so they rely on the environment to heat and cool).
They share physical similarities such as the rubbery skin, the fierce teeth, their claws.
Crocodiles also share an ancestor with dinosaurs.
Dinosaurs also share similarities with birds as birds are descendant of dinosaurs
