5 letter words:
boink11,
brink11,
bunko11,
krubi11,
korun9,
bourn7,
bruin7,
burin7,
robin7,
4 letter words:
birk10,
bonk10,
bork10,
bunk10,
knob10,
ikon8,
kino8,
kirn8,
knur8,
kuru8,
oink8,
rink8,
biro6,
born6,
brin6,
brio6,
burn6,
inro4,
iron4,
noir4,
nori4,
ruin4,
3 letter words:
kob9,
ink7,
irk7,
kin7,
kir7,
koi7,
kor7,
bin5,
bio5,
bro5,
bun5,
bur5,
nib5,
nob5,
nub5,
obi5,
orb5,
rib5,
rob5,
rub5,
urb5,
ion3,
nor3,
our3,
rin3,
run3,
urn3,
2 letter words:
ki6,
bi4,
bo4,
in2,
no2,
nu2,
oi2,
on2,
or2,
un2,