7 letter words:
unfence12,
6 letter words:
fennec11,
5 letter words:
fence10,
4 letter words:
feck13,
fuck13,
cuff12,
funk11,
keef11,
cuke10,
neck10,
keen8,
knee8,
kune8,
neuk8,
nuke8,
enuf7,
nene4,
3 letter words:
kef10,
eff9,
eek7,
eke7,
ken7,
kue7,
uke7,
fee6,
fen6,
feu6,
fun6,
cee5,
cue5,
ecu5,
nee3,
nun3,
2 letter words:
ef5,
fe5,
en2,
ne2,
nu2,
un2,