There are 18 words that start with 'harr'.
| harry | harrow | harried |
| harrier | harries | harrows |
| harridan | harriers | harrowed |
| harrower | harrumph | harrying |
| harridans | harrowers | harrowing |
| harrumphs | harrumphed | harrumphing |
Note: These 18 words that start with 'harr' are found from the USA & Canada version of the tournament Scrabble word list.