There are 14 words that start with 'hippo'.
| hippo | hippos |
| hippocras | hippocampi |
| hippodrome | hippogriff |
| hippocampal | hippocampus |
| hippocrases | hippodromes |
| hippogriffs | hippopotami |
| hippopotamus | hippopotamuses |
Note: These 14 words that start with 'hippo' are found from the USA & Canada version of the tournament Scrabble word list.