7 letter words
PLUMBER​13
REPLUMB​13
6 letter words (7 words)
BUMPER​12
LUMBER​10
RUMBLE​10
RUMPLE​10
LUMPER​10
REPLUM​10
UMBREL​10
5 letter words (14 words)
PLUME​9
PLUMB​11
BLUME​9
UMBER​9
LEMUR​7
RUBLE​7
BRULE​7
RUBEL​7
BLUER​7
BRUME​9
UMBEL​9
PULER​7
UMBLE​9
UMBRE​9
4 letter words (28 words)
BLUE​6
RULE​4
PURE​6
BUMP​10
PLUM​8
LUMP​8
MULE​6
LURE​4
BLUR​6
LUBE​6
PERM​8
PREM​8
BURP​8
BURL​6
RUMP​8
PURL​6
BERM​8
RUBE​6
MURE​6
MERL​6
3 letter words (32 words)
PER​5
PRE​5
PUB​7
REP​5
LEU​3
MEL​5
REM​5
RUE​3
RUB​5
BEL​5
BUR​5
ELM​5
RUM​5
EMU​5
BUM​7
PUR​5
LEP​5
REB​5
ERM​5
PEL​5
2 letter words (11 words)
BE​4
UP​4
ME​4
RE​2
EL​2
EM​4
ER​2
PE​4
UM​4
UR​2
MU​4