There are 14 words that start with 'humm'.
| hummed | hummer | hummus |
| hummers | humming | hummock |
| hummable | hummocks | hummocky |
| hummuses | hummocked | hummocking |
| hummingbird | hummingbirds | |
Note: These 14 words that start with 'humm' are found from the USA & Canada version of the tournament Scrabble word list.