Words formed from any letters in romps, 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.

6 letters

h - morphs  

o - promos  

t - tromps  

5 letters

h - morph  

k - porks  

y - prosy  

4 letters

3 letters

f - fop   for   fro  

g - mog   gor   gos  

k - kop   kor   kos  

x - pox   sox