6 letter words:
privet11,
5 letter words:
fifer11,
fiver11,
viper10,
refit8,
rivet8,
tripe7,
4 letter words:
pfft12,
fief10,
fife10,
five10,
riff10,
teff10,
tiff10,
perv9,
fire7,
fret7,
frit7,
reft7,
reif7,
rife7,
rift7,
rive7,
tref7,
vert7,
vier7,
peri6,
pert6,
pier6,
ripe6,
trip6,
rite4,
tier4,
tire4,
3 letter words:
eff9,
iff9,
eft6,
fer6,
fet6,
fie6,
fir6,
fit6,
ref6,
rev6,
rif6,
vet6,
vie6,
per5,
pet5,
pie5,
pit5,
rep5,
rip5,
tip5,
ire3,
rei3,
ret3,
tie3,
2 letter words:
ef5,
fe5,
if5,
pe4,
pi4,
er2,
et2,
it2,
re2,
ti2,