8 letter words:
furfuran14,
6 letter words:
kunkar14,
kunkur14,
uncuff14,
furfur12,
curran8,
5 letter words:
knack15,
frack14,
frank12,
crank11,
franc10,
furca10,
kauru9,
knaur9,
knurr9,
furan8,
crura7,
4 letter words:
fuck13,
caff12,
cuff12,
kark12,
kuku12,
fank11,
funk11,
cark10,
cauk10,
naff10,
nuff10,
rack10,
raff10,
ruck10,
ruff10,
cauf9,
curf9,
karn8,
knar8,
knur8,
kuna8,
kuru8,
nark8,
raku8,
rank8,
rark8,
faun7,
faur7,
frau7,
furr7,
carn6,
carr6,
cran6,
curn6,
curr6,
narc6,
nurr4,
raun4,
ruru4,
unau4,
3 letter words:
kak11,
kaf10,
aff9,
ark7,
auk7,
arf6,
auf6,
fan6,
far6,
fra6,
fun6,
fur6,
arc5,
can5,
car5,
cru5,
cur5,
ruc5,
nur3,
ran3,
run3,
urn3,
2 letter words:
ka6,
fa5,
an2,
ar2,
na2,
nu2,
un2,
ur2,