There are 28 7-letter words that end with 'to'.
Note: These 28 7-letter words that end with 'to' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with nto, tto, ato, ito, sto, eto, oto, lto, rto, uto, pto, cto, hto, xto.
4-letter words end with 'to' (13)