There are 16 words that start with 'leak'.
| leak | leaks | leaky | 
| leaked | leaker | leakage | 
| leakers | leakier | leakily | 
| leaking | leakages | leakiest | 
| leakless | leakiness | leakproof | 
| leakinesses | ||
Note: These 16 words that start with 'leak' are found from the USA & Canada version of the tournament Scrabble word list.