5 letter words:
furan8,
arnut5,
4 letter words:
fart7,
faun7,
faur7,
faut7,
frat7,
frau7,
raft7,
tufa7,
turf7,
aunt4,
rant4,
ratu4,
raun4,
runt4,
tarn4,
tuan4,
tuna4,
turn4,
3 letter words:
aft6,
arf6,
auf6,
fan6,
far6,
fat6,
fra6,
fun6,
fur6,
ant3,
art3,
nat3,
nur3,
nut3,
ran3,
rat3,
run3,
rut3,
tan3,
tar3,
tau3,
tun3,
urn3,
uta3,
2 letter words:
fa5,
an2,
ar2,
at2,
na2,
nu2,
ta2,
un2,
ur2,
ut2,