There are 16 words that end with 'osaur'.
| barosaur | allosaur | dinosaur |
| apatosaur | archosaur | carnosaur |
| hadrosaur | pterosaur | stegosaur |
| ankylosaur | brontosaur | cotylosaur |
| plesiosaur | pelycosaur | ichthyosaur |
| tyrannosaur | ||
Note: These 16 words that end with 'osaur' are found from the USA & Canada version of the tournament Scrabble word list.