6 letter words:
poison8,
5 letter words:
opsin7,
pions7,
pious7,
poons7,
snoop7,
spoon7,
4 letter words:
nips6,
oops6,
opus6,
pins6,
pion6,
piso6,
pois6,
pons6,
poon6,
poos6,
puns6,
snip6,
soup6,
spin6,
spun6,
upon6,
ions4,
nous4,
onos4,
onus4,
soon4,
3 letter words:
nip5,
ops5,
pin5,
pis5,
piu5,
poi5,
poo5,
psi5,
pun5,
pus5,
sip5,
sop5,
sup5,
upo5,
ups5,
ins3,
ion3,
noo3,
nos3,
nus3,
ono3,
ons3,
sin3,
son3,
sou3,
sun3,
uns3,
2 letter words:
op4,
pi4,
up4,
in2,
is2,
no2,
nu2,
oi2,
on2,
os2,
si2,
so2,
un2,
us2,