Based on epos, new words formed by adding one letter at the beginning or end:
a - paseo psoae c - copes copse scope d - dopes posed spode h - hopes i - poise k - pokes spoke l - lopes poles slope m - mopes poems pomes n - opens peons pones r - pores poser prose repos ropes spore t - estop pesto poets stope topes x - expos poxes y - poesy sepoy
