6 letter words:
fierce11,
5 letter words:
frock14,
kefir12,
creek11,
icker11,
ocker11,
force10,
4 letter words:
feck13,
fork11,
keef11,
kerf11,
kief11,
coke10,
cork10,
reck10,
rick10,
rock10,
coif9,
corf9,
fice9,
fico9,
foci9,
keir8,
kier8,
kore8,
reek8,
fere7,
fire7,
fore7,
free7,
froe7,
reef7,
reif7,
rife7,
cere6,
cero6,
cire6,
coir6,
core6,
rice6,
3 letter words:
kef10,
kif10,
ick9,
eek7,
eke7,
irk7,
kir7,
koi7,
kor7,
oke7,
fee6,
fer6,
fie6,
fir6,
foe6,
for6,
fro6,
ref6,
rif6,
cee5,
cor5,
ice5,
orc5,
rec5,
roc5,
ere3,
ire3,
ore3,
ree3,
rei3,
roe3,
2 letter words:
ki6,
ef5,
fe5,
if5,
of5,
er2,
oe2,
oi2,
or2,
re2,