7 letter words:
gruffer14,
5 letter words:
gruff12,
ruffe11,
grufe9,
regur6,
urger6,
4 letter words:
guff11,
ruff10,
frug8,
furr7,
grue5,
urge5,
ruer4,
3 letter words:
eff9,
feg7,
fug7,
erf6,
fer6,
feu6,
fur6,
ref6,
erg4,
gue4,
gur4,
reg4,
rug4,
err3,
rue3,
ure3,
2 letter words:
ef5,
fe5,
gu3,
ug3,
er2,
re2,
ur2,
