Words formed from any letters in ergs, 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

b - bergs  

d - dregs  

m - germs  

4 letters

c - recs  

f - refs   serf  

h - hers   resh  

k - kegs   skeg  

l - gels   legs  

p - pegs   reps  

v - revs  

w - grew  

3 letters

b - beg   reb  

c - rec   sec  

d - ged   red   eds  

f - fer   ref   efs  

h - her   hes   she  

k - keg  

v - veg   rev  

w - sew  

x - rex   sex  

y - gey   rye   yes