6 letter words:
fevers12,
5 letter words:
fever11,
feres8,
frees8,
reefs8,
serve8,
sever8,
veers8,
verse8,
4 letter words:
ever7,
eves7,
fees7,
fere7,
free7,
reef7,
refs7,
revs7,
serf7,
veer7,
vees7,
rees4,
seer4,
sere4,
3 letter words:
efs6,
eve6,
fee6,
fer6,
fes6,
ref6,
rev6,
vee6,
ere3,
ers3,
ree3,
res3,
see3,
ser3,
2 letter words:
ef5,
fe5,
er2,
es2,
re2,