6 letter words
PREFER​11
5 letter words (4 words)
REFER​8
FREER​8
FRERE​8
FERER​8
4 letter words (7 words)
FREE​7
PEER​6
REEF​7
PERE​6
FERE​7
PREE​6
FEER​7
3 letter words (11 words)
PER​5
PRE​5
FEE​6
REF​6
REP​5
PEE​5
ERR​3
FER​6
ERE​3
REE​3
ERF​6
2 letter words (6 words)
RE​2
EE​2
ER​2
FE​5
PE​4
EF​5