There are 11 9-letter words that start with 'supers'.
| supersafe | supersale | supersaur | 
| supersede | supersell | supershow | 
| supersize | supersoft | supersold | 
| superstar | superstud | |
Note: These 11 9-letter words that start with 'supers' are found from the USA & Canada version of the tournament Scrabble word list.