Previous solution:
elm, elms, ems, isle, ism, lei, leis, lie, lies, lime, limes, lis, mil, mile, miles, mils, sei, semi, slim, slime, smile
elm, elms, ems, isle, ism, lei, leis, lie, lies, lime, limes, lis, mil, mile, miles, mils, sei, semi, slim, slime, smile