5 letter words:
finis8,
4 letter words:
zins13,
fibs9,
fubs9,
fini7,
fins7,
funs7,
bins6,
buns6,
ibis6,
nibs6,
nubs6,
snib6,
snub6,
nisi4,
unis4,
3 letter words:
fiz15,
biz14,
zin12,
fib8,
fub8,
fin6,
fun6,
ifs6,
sif6,
bin5,
bis5,
bun5,
bus5,
nib5,
nub5,
sib5,
sub5,
ins3,
nis3,
nus3,
sin3,
sui3,
sun3,
uni3,
uns3,
2 letter words:
if5,
bi4,
in2,
is2,
nu2,
si2,
un2,
us2,