9 letter words:
unhurtful15,
7 letter words:
hurtful13,
ruthful13,
6 letter words:
unfurl9,
unhurt9,
unturf9,
urnful9,
5 letter words:
furth11,
thurl8,
uhuru8,
4 letter words:
furl7,
hunt7,
hurl7,
hurt7,
ruth7,
thru7,
turf7,
lunt4,
nurl4,
runt4,
turn4,
3 letter words:
flu6,
fun6,
fur6,
hun6,
hut6,
nth6,
lur3,
nur3,
nut3,
run3,
rut3,
tun3,
ulu3,
urn3,
utu3,
2 letter words:
uh5,
nu2,
un2,
ur2,
ut2,