6 letter words:
unific11,
5 letter words:
ficin10,
incur7,
ricin7,
runic7,
4 letter words:
cuif9,
curf9,
fuci9,
firn7,
curn6,
unci6,
uric6,
ruin4,
3 letter words:
fin6,
fir6,
fun6,
fur6,
rif6,
cru5,
cur5,
rin3,
run3,
urn3,
2 letter words:
if5,
in2,
nu2,
un2,