There are 17 words that start with 'tos'.
| tosh | toss | tost | toshes |
| tossed | tosser | tosses | tossup |
| tossers | tossing | tosspot | tossups |
| tostada | tostado | tosspots | tostadas |
| tostados | |||
Note: These 17 words that start with 'tos' are found from the USA & Canada version of the tournament Scrabble word list.