There are 18 words that start with 'boil'.
| boil | boils | boiled |
| boiler | boilers | boiling |
| boiloff | boilable | boiloffs |
| boilover | boilingly | boilovers |
| boilersuit | boilermaker | boilerplate |
| boilersuits | boilermakers | boilerplates |
Note: These 18 words that start with 'boil' are found from the USA & Canada version of the tournament Scrabble word list.