There are 10 words that start with 'superw'.
| superwave | superwide | superwife | 
| superwaves | superwides | superwives | 
| superwoman | superwomen | superweapon | 
| superweapons | ||
Note: These 10 words that start with 'superw' are found from the USA & Canada version of the tournament Scrabble word list.