| Answer | Crossword Clue |
|---|---|
| MASTODON | Massive extinct mammal |
| cotylosaur | an extinct primitive reptile with massive body and short legs |
| cotylosaurs | COTYLOSAUR, an extinct primitive reptile with massive body and short legs |
| ELEPHANT | Massive mammal |
| RHINO | Massive mammal |
| MASTODON | Prehistoric massive mammal |
| RHINO | Massive mammal, for short |
| hippopotamus | A large thick-skinned semiaquatic African mammal, with massive jaws and large tusks |
| hippopotamuses | A large thick-skinned semiaquatic African mammal, with massive jaws and large tusks |
| hippopotami | A large thick-skinned semiaquatic African mammal, with massive jaws and large tusks |
