6 letter words:
effing13,
infeft12,
feting10,
5 letter words:
knife12,
eking10,
feign9,
feint8,
fient8,
tinge6,
4 letter words:
kiff14,
fike11,
fink11,
kief11,
fief10,
fife10,
niff10,
teff10,
tiff10,
gink9,
king9,
gift8,
kent8,
kine8,
kite8,
knit8,
tike8,
tink8,
feni7,
fent7,
fine7,
neif7,
nief7,
nife7,
geit5,
gent5,
gien5,
gite5,
tige5,
ting5,
nite4,
tine4,
3 letter words:
kef10,
kif10,
eff9,
iff9,
keg8,
eik7,
feg7,
fig7,
gif7,
ink7,
ken7,
ket7,
kin7,
kit7,
nek7,
eft6,
fen6,
fet6,
fie6,
fin6,
fit6,
nef6,
tef6,
eng4,
gen4,
get4,
gie4,
gin4,
git4,
neg4,
teg4,
tig4,
net3,
nie3,
nit3,
ten3,
tie3,
tin3,
2 letter words:
ki6,
ef5,
fe5,
if5,
gi3,
en2,
et2,
in2,
it2,
ne2,
te2,
ti2,