There are 11 words that start with 'boas'.
| boas | boast |
| boasts | boasted |
| boaster | boasters |
| boastful | boasting |
| boastfully | boastfulness |
| boastfulnesses | |
Note: These 11 words that start with 'boas' are found from the USA & Canada version of the tournament Scrabble word list.