5 letter words:
crept9,
certs7,
crest7,
perst7,
perts7,
prest7,
strep7,
4 letter words:
ceps8,
pecs8,
spec8,
cert6,
pert6,
pest6,
pets6,
recs6,
reps6,
sect6,
sept6,
spet6,
step6,
tecs6,
erst4,
rest4,
rets4,
tres4,
3 letter words:
cep7,
pec7,
per5,
pes5,
pet5,
pre5,
pst5,
rec5,
rep5,
sec5,
tec5,
ers3,
est3,
res3,
ret3,
ser3,
set3,
tes3,
2 letter words:
pe4,
er2,
es2,
et2,
re2,
st2,
te2,