7 letter words:
upfront12,
6 letter words:
uptorn8,
5 letter words:
fount8,
front8,
futon8,
punto7,
puton7,
4 letter words:
pouf9,
prof9,
font7,
fort7,
four7,
tofu7,
turf7,
porn6,
port6,
pour6,
pout6,
punt6,
roup6,
trop6,
upon6,
rout4,
runt4,
torn4,
tour4,
turn4,
unto4,
3 letter words:
fop8,
fon6,
for6,
fou6,
fro6,
fun6,
fur6,
oft6,
opt5,
pot5,
pro5,
pun5,
pur5,
put5,
top5,
tup5,
upo5,
urp5,
nor3,
not3,
nut3,
ort3,
our3,
out3,
rot3,
run3,
rut3,
ton3,
tor3,
tun3,
urn3,
2 letter words:
of5,
op4,
up4,
no2,
nu2,
on2,
or2,
to2,
un2,
ut2,