7 letter words:
miffier15,
6 letter words:
iffier12,
5 letter words:
fifer11,
fermi10,
firie8,
4 letter words:
meff12,
miff12,
fief10,
fife10,
fifi10,
riff10,
ferm9,
firm9,
fier7,
fire7,
reif7,
rife7,
emir6,
meri6,
mire6,
miri6,
riem6,
rime6,
3 letter words:
eff9,
iff9,
fem8,
erf6,
fer6,
fie6,
fir6,
ref6,
rif6,
mir5,
rem5,
rim5,
ire3,
rei3,
2 letter words:
ef5,
fe5,
if5,
em4,
me4,
mi4,
er2,
re2,