9 letter words:
petrifier14,
8 letter words:
freitier11,
7 letter words:
prefire12,
ferrite10,
fierier10,
reifier10,
riftier10,
tripier9,
6 letter words:
perfet11,
prefer11,
preife11,
priefe11,
feirie9,
ferret9,
refire9,
periti8,
perter8,
pitier8,
etrier6,
reiter6,
retire6,
5 letter words:
preif10,
prief10,
ferer8,
fiere8,
firer8,
firie8,
freer8,
freet8,
freit8,
frere8,
frier8,
refer8,
refit8,
rifer8,
rifte8,
terfe8,
treif8,
peter7,
petre7,
piert7,
prier7,
riper7,
tripe7,
retie5,
trier5,
4 letter words:
feer7,
feet7,
fere7,
fete7,
fier7,
fire7,
free7,
fret7,
frit7,
reef7,
reft7,
reif7,
rife7,
rift7,
terf7,
tref7,
peer6,
pere6,
peri6,
pert6,
pier6,
piet6,
pree6,
ripe6,
ript6,
tipi6,
trip6,
rete4,
rite4,
teer4,
tier4,
tire4,
tirr4,
tree4,
trie4,
3 letter words:
eft6,
erf6,
fee6,
fer6,
fet6,
fie6,
fir6,
fit6,
ref6,
rif6,
tef6,
pee5,
per5,
pet5,
pie5,
pir5,
pit5,
pre5,
rep5,
rip5,
tip5,
ere3,
err3,
ire3,
ree3,
rei3,
ret3,
rit3,
tee3,
tie3,
2 letter words:
ef5,
fe5,
if5,
pe4,
pi4,
ee2,
er2,
et2,
it2,
re2,
te2,
ti2,