There are 22 10-letter words that start with 'shi'.
Note: These 22 10-letter words that start with 'shi' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words start with ship, shin, shir, shit, shiv, shif, shik, shil, shie, shim, shic, shig, shia, shib, shii, shis.
4-letter words start with 'shi' (5)