9 letter words:
thriftier15,
interfere12,
8 letter words:
enfetter11,
ferritin11,
fetterer11,
frettier11,
referent11,
thirteen11,
intertie8,
retinite8,
7 letter words:
heftier13,
errhine10,
fernier10,
ferrite10,
fierier10,
fretter10,
fritter10,
inherit10,
neither10,
niftier10,
reefier10,
referee10,
refiner10,
reifier10,
teether10,
therein10,
enterer7,
nettier7,
niterie7,
nitrite7,
nittier7,
reenter7,
reinter7,
rentier7,
retiree7,
teenier7,
tentier7,
terreen7,
terrene7,
terrine7,
6 letter words:
hefter12,
heifer12,
thrift12,
either9,
ethene9,
feirie9,
ferine9,
ferret9,
fetter9,
finite9,
fitter9,
heinie9,
herein9,
hinter9,
hitter9,
inhere9,
nether9,
reefer9,
refine9,
refire9,
rehire9,
teethe9,
tether9,
theine9,
titfer9,
tither9,
eerier6,
entire6,
entree6,
eterne6,
netter6,
renter6,
rerent6,
retene6,
retine6,
retint6,
retire6,
ritter6,
teener6,
teeter6,
tenter6,
tentie6,
terete6,
terret6,
territ6,
tinier6,
tinter6,
triene6,
triter6,
5 letter words:
firth11,
frith11,
theft11,
thief11,
ether8,
feint8,
finer8,
firer8,
freer8,
frere8,
frier8,
fritt8,
hiree8,
hirer8,
infer8,
ither8,
refer8,
refit8,
rifer8,
teeth8,
tenth8,
thein8,
their8,
there8,
thine8,
three8,
tithe8,
eerie5,
enter5,
inert5,
inter5,
niter5,
nitre5,
rente5,
retie5,
tenet5,
terne5,
tetri5,
titer5,
titre5,
treen5,
trier5,
trine5,
trite5,
4 letter words:
heft10,
feet7,
fere7,
fern7,
fete7,
fine7,
fire7,
firn7,
free7,
fret7,
frit7,
heir7,
hent7,
here7,
hern7,
hint7,
hire7,
neif7,
reef7,
reft7,
reif7,
rife7,
rift7,
teth7,
thee7,
then7,
thin7,
thir7,
tref7,
erne4,
inti4,
nett4,
nite4,
rein4,
rent4,
rete4,
rite4,
teen4,
tent4,
tern4,
tier4,
tine4,
tint4,
tire4,
titi4,
tree4,
tret4,
3 letter words:
feh9,
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,
tet3,
tie3,
tin3,
tit3,
2 letter words:
ef5,
eh5,
fe5,
he5,
hi5,
if5,
en2,
er2,
et2,
in2,
it2,
ne2,
re2,
ti2,