There are 20 7-letter words that start with 'quin'.
| quinary | quinate | quinces | quinela | 
| quinina | quinine | quinins | quinnat | 
| quinoas | quinoid | quinols | quinone | 
| quintal | quintan | quintar | quintas | 
| quintes | quintet | quintic | quintin | 
Note: These 20 7-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)