There are 17 10-letter words that start with 'tou'.
| touchbacks | touchdowns | touchholes |
| touchiness | touchingly | touchlines |
| touchmarks | touchstone | touchtones |
| touchwoods | tougheners | toughening |
| tourbillon | tourmaline | tournament |
| tourneying | tourniquet | |
Note: These 17 10-letter words that start with 'tou' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with touc, tour, toug, tous, tout, touz, toup.
4-letter words start with 'tou' (2)