11 letter words:
freethinker21,
9 letter words:
rethinker16,
interfere12,
8 letter words:
tinkerer12,
referent11,
7 letter words:
rethink14,
thinker14,
heftier13,
kernite11,
reekier11,
errhine10,
fernier10,
ferrite10,
neither10,
reefier10,
refiner10,
therein10,
enterer7,
reenter7,
reinter7,
rentier7,
retiree7,
teenier7,
terreen7,
terrene7,
terrine7,
6 letter words:
knifer13,
hefter12,
heifer12,
keener10,
ketene10,
reeker10,
reknit10,
tinker10,
either9,
ethene9,
ferine9,
ferret9,
herein9,
hinter9,
inhere9,
nether9,
reefer9,
refine9,
refire9,
rehire9,
theine9,
eerier6,
entire6,
entree6,
eterne6,
renter6,
rerent6,
retene6,
retine6,
retire6,
teener6,
triene6,
5 letter words:
hiker12,
kefir12,
kithe12,
knife12,
think12,
firth11,
frith11,
thief11,
inker9,
kente9,
kerne9,
kiter9,
reink9,
trike9,
ether8,
feint8,
finer8,
firer8,
freer8,
frere8,
frier8,
hiree8,
hirer8,
infer8,
ither8,
refer8,
refit8,
rifer8,
thein8,
their8,
there8,
thine8,
three8,
eerie5,
enter5,
inert5,
inter5,
niter5,
nitre5,
rente5,
retie5,
terne5,
treen5,
trier5,
trine5,
4 letter words:
fink11,
hike11,
keef11,
kerf11,
khet11,
kief11,
kith11,
heft10,
keen8,
keet8,
keir8,
kent8,
kern8,
kier8,
kine8,
kirn8,
kite8,
knee8,
knit8,
reek8,
rink8,
tike8,
trek8,
feet7,
fere7,
fern7,
fete7,
fine7,
fire7,
firn7,
free7,
fret7,
frit7,
heir7,
hent7,
here7,
hern7,
hint7,
hire7,
neif7,
reef7,
reft7,
reif7,
rife7,
rift7,
thee7,
then7,
thin7,
thir7,
tref7,
erne4,
nite4,
rein4,
rent4,
rete4,
rite4,
teen4,
tern4,
tier4,
tine4,
tire4,
tree4,
3 letter words:
kef10,
khi10,
kif10,
feh9,
eek7,
eke7,
ink7,
irk7,
ken7,
kin7,
kir7,
kit7,
eft6,
eth6,
fee6,
fen6,
fer6,
fet6,
fie6,
fin6,
fir6,
fit6,
hen6,
her6,
het6,
hie6,
hin6,
hit6,
nth6,
ref6,
rif6,
the6,
ere3,
ern3,
err3,
ire3,
nee3,
net3,
nit3,
ree3,
rei3,
ret3,
rin3,
tee3,
ten3,
tie3,
tin3,
2 letter words:
ki6,
ef5,
eh5,
fe5,
he5,
hi5,
if5,
en2,
er2,
et2,
in2,
it2,
ne2,
re2,
ti2,
