7 letter words:
rackful16,
6 letter words:
carful11,
fulcra11,
furcal11,
5 letter words:
flack14,
frack14,
caulk11,
furca10,
fural8,
4 letter words:
fuck13,
flak11,
calk10,
cark10,
cauk10,
lack10,
luck10,
rack10,
ruck10,
calf9,
cauf9,
curf9,
kula8,
lark8,
lurk8,
raku8,
farl7,
faur7,
frau7,
furl7,
lauf7,
carl6,
caul6,
curl6,
3 letter words:
kaf10,
ark7,
auk7,
alf6,
arf6,
auf6,
far6,
flu6,
fra6,
fur6,
arc5,
car5,
cru5,
cur5,
lac5,
ruc5,
lar3,
lur3,
2 letter words:
ka6,
fa5,
al2,
ar2,
la2,
ur2,