Alligator and Sauropod

Alligator noun - Either of two amphibious reptiles related to crocodiles but with shorter broader snouts.

Sauropod and alligator are semantically related. In some cases you can use "Sauropod" instead a noun "Alligator".

Sauropod noun - Very large herbivorous dinosaur of the Jurassic and Cretaceous having a small head a long neck and tail and five-toed limbs; largest known land animal.

Alligator and sauropod are semantically related. You can use "Alligator" instead a noun "Sauropod".