7 letter words
PROSPER​11
PROPERS​11
6 letter words (7 words)
PROPER​10
ROPERS​8
REPROS​8
PORERS​8
PREOPS​10
PRORES​8
PROSER​8
5 letter words (20 words)
PROSE​7
PROPS​9
ROPES​7
POSER​7
ROPER​7
REPRO​7
PORES​7
PREPS​9
SPORE​7
POPES​9
REPOS​7
PERPS​9
PREOP​9
PEPOS​9
POEPS​9
PORER​7
PRORE​7
REPPS​9
RORES​5
SORER​5
4 letter words (27 words)
ROSE​4
POPE​8
PREP​8
PROS​6
ROPE​6
POSE​6
PROP​8
PESO​6
SORE​4
POPS​8
REPS​6
EROS​4
PORE​6
REPO​6
ORES​4
EPOS​6
PEPS​8
PERP​8
OPES​6
ERRS​4
3 letter words (21 words)
PER​5
PRO​5
PRE​5
POP​7
RES​3
REP​5
POS​5
SER​3
OPS​5
ERR​3
ORE​3
PEP​7
ERS​3
ROE​3
ORS​3
SOP​5
PES​5
OES​3
REO​3
OPE​5
2 letter words (10 words)
OR​2
SO​2
RE​2
OS​2
PO​4
ES​2
OP​4
ER​2
PE​4
OE​2