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