There are 34 5-letter words that start with 'sto'.
Note: These 34 5-letter words that start with 'sto' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with stoc, stor, ston, stom, stop, stou, stoo, stol, stok, stot, stow, stod, stoi, stoa, stov, stog, stob, stos.
4-letter words start with 'sto' (5)