There are 14 words that start with 'seawa'.
| seawan | seaway | seawall | 
| seawans | seawant | seaward | 
| seaware | seaways | seawalls | 
| seawants | seawards | seawares | 
| seawater | seawaters | |
Note: These 14 words that start with 'seawa' are found from the USA & Canada version of the tournament Scrabble word list.