6 letter words:
forint9,
unroof9,
notour6,
turion6,
unroot6,
5 letter words:
fount8,
front8,
fruit8,
futon8,
unfit8,
intro5,
nitro5,
nooit5,
outro5,
roton5,
rutin5,
4 letter words:
fino7,
firn7,
foin7,
font7,
foot7,
fort7,
four7,
frit7,
info7,
rift7,
roof7,
tofu7,
turf7,
inro4,
into4,
iron4,
noir4,
nori4,
nout4,
oint4,
onto4,
oont4,
ourn4,
riot4,
roin4,
ront4,
roon4,
root4,
roti4,
roto4,
rout4,
ruin4,
runt4,
tiro4,
toon4,
tori4,
torn4,
toro4,
toun4,
tour4,
trin4,
trio4,
tron4,
turn4,
unit4,
unto4,
3 letter words:
fin6,
fir6,
fit6,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
oft6,
oof6,
orf6,
rif6,
ufo6,
ion3,
nit3,
noo3,
nor3,
not3,
nur3,
nut3,
ono3,
oon3,
oor3,
oot3,
ort3,
our3,
out3,
rin3,
rit3,
roo3,
rot3,
run3,
rut3,
tin3,
ton3,
too3,
tor3,
tui3,
tun3,
uni3,
urn3,
2 letter words:
if5,
of5,
in2,
io2,
it2,
no2,
nu2,
oi2,
on2,
oo2,
or2,
ou2,
ti2,
to2,
un2,
ur2,
ut2,