There are 10 12-letter words that start with 'qui'.
| quicksilvers | quinquennial | quinquennium | 
| quintessence | quintillions | quirkinesses | 
| quislingisms | quitclaiming | quixotically | 
| quizzicality | ||
Note: These 10 12-letter words that start with 'qui' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with quin, quie, quic, quil, quir, quit, quip, quiz, quix, quiv, quib, quid, quis, quif.
4-letter words start with 'qui' (5)