There are 21 words that start with 'seaw'.
| seawan | seaway | 
| seawall | seawans | 
| seawant | seaward | 
| seaware | seaways | 
| seaweed | seawalls | 
| seawants | seawards | 
| seawares | seawater | 
| seaweeds | seawaters | 
| seaworthy | seaworthier | 
| seaworthiest | seaworthiness | 
| seaworthinesses | |
Note: These 21 words that start with 'seaw' are found from the USA & Canada version of the tournament Scrabble word list.