There are 33 10-letter words that start with 'win'.
Note: These 33 10-letter words that start with 'win' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with wind, wint, wing, wine, winn, winc, wink, wins, wini, wino, winz, winl, winy.
4-letter words start with 'win' (7)