There are 20 8-letter words that start with 'quin'.
| quincunx | quinelas | quinella | quiniela | 
| quininas | quinines | quinnats | quinoids | 
| quinolin | quinones | quinsied | quinsies | 
| quintain | quintals | quintans | quintars | 
| quintets | quintics | quintile | quintins | 
Note: These 20 8-letter words that start with 'quin' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with quint, quino, quini, quinc, quinq, quina, quine, quins, quind, quinn.
5-letter words start with 'quin' (2)