5 letter words:
confs10,
focus10,
conus7,
oncus7,
uncos7,
4 letter words:
conf9,
fusc9,
fons7,
fous7,
funs7,
ufos7,
cons6,
unco6,
nous4,
onus4,
3 letter words:
fon6,
fou6,
fun6,
ufo6,
con5,
cos5,
soc5,
nos3,
nus3,
ons3,
ous3,
son3,
sou3,
sun3,
uns3,
2 letter words:
of5,
no2,
nu2,
on2,
os2,
ou2,
so2,
un2,
us2,