5 letter words:
churr10,
4 letter words:
chug10,
curf9,
frug8,
fugu8,
crud7,
curd7,
furr7,
curr6,
drug6,
durr5,
guru5,
ruru4,
3 letter words:
duh7,
fud7,
fug7,
hug7,
ugh7,
cud6,
fur6,
cru5,
cur5,
dug5,
ruc5,
gur4,
rud4,
rug4,
urd4,
2 letter words:
ch7,
uh5,
gu3,
ug3,
ur2,