6 letter words:
rueful9,
5 letter words:
fugle9,
fugue9,
grufe9,
gluer6,
gruel6,
luger6,
4 letter words:
fleg8,
frug8,
fugu8,
gulf8,
flue7,
fuel7,
furl7,
glue5,
grue5,
gule5,
gurl5,
guru5,
luge5,
urge5,
lure4,
rule4,
3 letter words:
feg7,
fug7,
elf6,
erf6,
fer6,
feu6,
flu6,
fur6,
ref6,
erg4,
gel4,
gue4,
gul4,
gur4,
leg4,
lug4,
reg4,
rug4,
leu3,
lur3,
rue3,
ule3,
ulu3,
ure3,
2 letter words:
ef5,
fe5,
gu3,
ug3,
el2,
er2,
re2,
ur2,