Based on leasts, new words formed by adding one letter at the beginning or end:
a - aelsst b - atlases c - stables d - castles e - desalts f - teasels h - falsest i - fatless l - haslets m - hatless o - sheltas p - salties r - sallets s - stellas t - matless u - samlets v - solates x - pastels y - staples
