Based on roset, new words formed by adding one letter at the beginning or end:
a - eorst b - oaters c - orates d - sorbet e - strobe f - corset g - coster h - escort i - rectos k - scoter l - sector m - doters n - sorted o - stored p - strode r - stereo s - fetors t - fortes u - foster v - softer w - ergots x - horste y - others z - reshot