8 letter words:
biotoxin17,
6 letter words:
biotin8,
bonito8,
5 letter words:
toxin12,
binit7,
biont7,
obiit7,
oobit7,
nooit5,
4 letter words:
bint6,
bito6,
boon6,
boot6,
obit6,
inti4,
into4,
oint4,
onto4,
oont4,
toon4,
3 letter words:
box12,
nix10,
nox10,
oxo10,
tix10,
bin5,
bio5,
bit5,
boi5,
bon5,
boo5,
bot5,
nib5,
nob5,
obi5,
obo5,
ion3,
nit3,
noo3,
not3,
ono3,
oon3,
oot3,
tin3,
ton3,
too3,
2 letter words:
ox9,
xi9,
bi4,
bo4,
ob4,
in2,
io2,
it2,
no2,
oi2,
on2,
oo2,
ti2,
to2,