5 letter words:
books11,
kobos11,
spook11,
pubis9,
pious7,
4 letter words:
bisk10,
book10,
bosk10,
busk10,
kips10,
kobo10,
kobs10,
kops10,
skip10,
spik10,
bops8,
kois8,
pubs8,
sook8,
souk8,
bios6,
boos6,
obis6,
oops6,
opus6,
piso6,
pois6,
poos6,
soup6,
3 letter words:
kip9,
kob9,
kop9,
bop7,
kis7,
koi7,
kos7,
pub7,
ski7,
suk7,
bio5,
bis5,
boo5,
bos5,
bus5,
obi5,
ops5,
pis5,
piu5,
poi5,
poo5,
psi5,
pus5,
sib5,
sip5,
sob5,
sop5,
sub5,
sup5,
upo5,
ups5,
sou3,
2 letter words:
ki6,
bi4,
bo4,
op4,
pi4,
up4,
is2,
oi2,
os2,
si2,
so2,
us2,