There are 381 9-letter words that end with 'as'.
Note: These 381 9-letter words that end with 'as' are found from the USA & Canada version of the tournament Scrabble word list.
Also see words end with ias, las, ras, mas, nas, tas, eas, cas, das, bas, gas, has, kas, sas, vas, pas, zas, yas, oas, fas, uas, jas, was, aas, xas, qas.
3-letter words end with 'as' (14)