7 letter words:
reefier10,
6 letter words:
firmer11,
reefer9,
refire9,
eerier6,
5 letter words:
fermi10,
firer8,
freer8,
frere8,
frier8,
refer8,
rifer8,
emeer7,
merer7,
rimer7,
eerie5,
4 letter words:
feme9,
firm9,
fere7,
fire7,
free7,
reef7,
reif7,
rife7,
emir6,
mere6,
mire6,
rime6,
3 letter words:
fem8,
fee6,
fer6,
fie6,
fir6,
ref6,
rif6,
eme5,
mir5,
rem5,
rim5,
ere3,
err3,
ire3,
ree3,
rei3,
2 letter words:
ef5,
fe5,
if5,
em4,
me4,
mi4,
er2,
re2,