7 letter words
CRUMBLE​13
CLUMBER​13
6 letter words (5 words)
LUMBER​10
RUMBLE​10
CUMBER​12
BECURL​10
UMBREL​10
5 letter words (16 words)
CRUEL​7
ULCER​7
CRUMB​11
BLUME​9
UMBER​9
LEMUR​7
RUBLE​7
BRULE​7
RUBEL​7
LUCRE​7
BLUER​7
CUBER​9
BRUME​9
UMBEL​9
UMBLE​9
UMBRE​9
4 letter words (26 words)
CLUB​8
BLUE​6
RULE​4
CURE​6
CUBE​8
CLUE​6
CURL​6
CURB​8
MULE​6
LURE​4
BLUR​6
LUBE​6
LUCE​6
CRUE​6
MERC​8
CLEM​8
BURL​6
ECRU​6
BERM​8
RUBE​6
3 letter words (30 words)
CUM​7
REC​5
LEU​3
MEL​5
REM​5
RUE​3
CUE​5
CUR​5
RUB​5
BEL​5
BUR​5
ELM​5
RUM​5
CUB​7
EMU​5
BUM​7
ECU​5
CEL​5
REB​5
ERM​5
2 letter words (9 words)
BE​4
ME​4
RE​2
EL​2
EM​4
ER​2
UM​4
UR​2
MU​4