Words formed from any letters in espy, plus optional blank

The value of the blank, or of an existing letter already on the game board, is shown at the start of each line.

5 letters

h - hypes  

k - pesky  

x - pyxes  

e - seepy  

i - yipes  

4 letters

b - beys   byes  

g - pegs   gyps  

s - espy   pyes  

x - sexy  

y - espy   pyes  

3 letters

b - bey   bye   bys  

c - cep   pec   sec  

f - efs   fey  

k - kep   key   sky  

m - ems  

x - sex   pyx