Based on repos, new words formed by adding one letter at the beginning or end:
a - eoprs b - operas c - pareos d - soaper e - probes g - copers h - corpse i - dopers k - pedros l - prosed m - spored n - repose o - gropes r - ephors s - hopers t - posher u - poiser v - pokers w - lopers y - polers
