6 letter words:
trecks12,
5 letter words:
recks11,
treck11,
treks9,
certs7,
crest7,
4 letter words:
reck10,
erks8,
kest8,
kets8,
sekt8,
serk8,
sker8,
sket8,
trek8,
cert6,
recs6,
sect6,
tecs6,
erst4,
rest4,
rets4,
tres4,
3 letter words:
erk7,
ket7,
tsk7,
rec5,
sec5,
tec5,
ers3,
est3,
res3,
ret3,
ser3,
set3,
tes3,
2 letter words:
er2,
es2,
et2,
re2,
st2,
te2,