There are 15 words that start with 'hammer'.
| hammer | hammers | hammered |
| hammerer | hammerers | hammering |
| hammerkop | hammertoe | hammerhead |
| hammerkops | hammerless | hammerlock |
| hammertoes | hammerheads | hammerlocks |
Note: These 15 words that start with 'hammer' are found from the USA & Canada version of the tournament Scrabble word list.