There are 17 words that start with 'quai'.
| quai | quail | quais | 
| quaich | quaigh | quails | 
| quaint | quaichs | quaighs | 
| quailed | quaiches | quailing | 
| quainter | quaintly | quaintest | 
| quaintness | quaintnesses | |
Note: These 17 words that start with 'quai' are found from the USA & Canada version of the tournament Scrabble word list.