5 letter words:
knops11,
knosp11,
knots9,
fonts8,
4 letter words:
knop10,
kops10,
fops9,
knot8,
fons7,
font7,
soft7,
opts6,
pons6,
post6,
pots6,
spot6,
stop6,
tops6,
snot4,
tons4,
3 letter words:
kop9,
fop8,
kos7,
tsk7,
fon6,
oft6,
ops5,
opt5,
pot5,
pst5,
sop5,
top5,
nos3,
not3,
ons3,
son3,
sot3,
ton3,
2 letter words:
of5,
op4,
no2,
on2,
os2,
so2,
to2,