There are 11 words that start with 'exerc'.
| exercise | exercised | 
| exerciser | exercises | 
| exercycle | exercisers | 
| exercising | exercycles | 
| exercisable | exercitation | 
| exercitations | |
Note: These 11 words that start with 'exerc' are found from the USA & Canada version of the tournament Scrabble word list.