There are 10 words that start with 'quen'.
| quench | quenched | quencher | 
| quenches | quenelle | quenchers | 
| quenching | quenelles | quenchable | 
| quenchless | ||
Note: These 10 words that start with 'quen' are found from the USA & Canada version of the tournament Scrabble word list.