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diplodocus vs. brontosaurus

diplodocus
[dih-plod-uh-kuhs] / dɪˈplɒd ə kəs /

noun

diplodocuses plural

  1. a huge herbivorous dinosaur of the genus Diplodocus, from the Late Jurassic Epoch of western North America, growing to a length of about 87 feet (26.5 meters).

brontosaurus
[bron-tuh-sawr-uhs] / ˌbrɒn təˈsɔr əs /

noun

brontosauruses, plural brontosauri plural

  1. brontosaur.