8 letter words:
unprison10,
7 letter words:
inpours9,
6 letter words:
inpour8,
orpins8,
pinons8,
prions8,
prison8,
proins8,
purins8,
spinor8,
unpins8,
unrips8,
inruns6,
inurns6,
ronins6,
unions6,
unison6,
5 letter words:
noups7,
opsin7,
orpin7,
pinon7,
pions7,
pious7,
pirns7,
porns7,
pours7,
prion7,
proin7,
psion7,
purin7,
puris7,
roups7,
sirup7,
spurn7,
unpin7,
unrip7,
inrun5,
inurn5,
irons5,
noirs5,
nonis5,
noris5,
nouns5,
ornis5,
roins5,
ronin5,
rosin5,
ruins5,
union5,
urson5,
4 letter words:
nips6,
noup6,
opus6,
oups6,
pins6,
pion6,
pirn6,
pirs6,
piso6,
pois6,
pons6,
porn6,
pour6,
pros6,
puir6,
puns6,
puri6,
purs6,
rips6,
risp6,
roup6,
snip6,
soup6,
spin6,
spun6,
spur6,
upon6,
urps6,
inns4,
inro4,
ions4,
iron4,
noir4,
noni4,
nori4,
noun4,
nous4,
nuns4,
nurs4,
onus4,
ourn4,
ours4,
rins4,
roin4,
ruin4,
runs4,
sori4,
sorn4,
sour4,
sunn4,
unis4,
urns4,
3 letter words:
nip5,
ops5,
oup5,
pin5,
pir5,
pis5,
piu5,
poi5,
pos5,
pro5,
psi5,
pun5,
pur5,
pus5,
rip5,
sip5,
sop5,
sup5,
upo5,
ups5,
urp5,
inn3,
ins3,
ion3,
ios3,
iso3,
nis3,
non3,
nor3,
nos3,
nun3,
nur3,
nus3,
ons3,
ors3,
our3,
ous3,
rin3,
run3,
sin3,
sir3,
son3,
sou3,
sri3,
sui3,
sun3,
sur3,
uni3,
uns3,
urn3,
2 letter words:
op4,
pi4,
po4,
up4,
in2,
io2,
is2,
no2,
nu2,
oi2,
on2,
or2,
os2,
ou2,
si2,
so2,
un2,
ur2,
us2,