Common words:
* bake
* ball
* band
* bass
* bear
* beat
* belt
* bend
* best
* bite
* blue
* body
* bold
* bomb
* bone
* book
* born
* boss
* both
* bowl
* boys
* brag
* bran
* brow
* buck
* bull
* burn
* bush
* bust
* byre
Less common words:
* bask
* bays
* beam
* bean
* beer
* begs
* bends
* bent
* beta
* bias
* bids
* biff
* bill
* bind
* bird
* bisk
* blab
* blah
* bled
* blob
* bloc
* blog
* blow
* blue
* blur
* boar
* boat
* boil
* bold
* bolt
* bomb
* bond
* boon
* boot
* bore
* born
* boss
* bout
* box
* boy
* brae
* bran
* brat
* bray
* bred
* brew
* brig
* brim
* brow
* buck
* budg
* buff
* bulb
* bulk
* bull
* bump
* bung
* burr
* bush
* bust
* buys
This is not an exhaustive list, but it should give you a good starting point.