- blackball
- blacksmith chief
- blackwood
- blind
- blind date
- blindly
- blindness
- blinkers
- blissful
- blowback
- blowing pipe
- blowlamp
- boater
- bodeful
- booby
- boogers
- book
- book mark
- book-learned
- bookmaker
- bookpost
- boozer
- borax
- borderland
- bordetella pertussis
- bore
- borewell
- bowel
- bower
- box something in, box someone in
- boxer
- boxing
- boyar
- brahminhood
- brahminy kite
- braided hair
- brain
- brain drain
- brainstem
- bread-fruit
- breadth
- break
- breakaway
- breakwater
- breast movement
- brevity
- bridge
- brimful
- brimstone
- bring something home to someone
- bring to a head
- brinkmanship
- brio
- brisket
- Britain
- broach
- broad gauge
- broken thing
- bronze-smith
- brood
- brutalize
- brutify
- bryology
- bubbly
- buck
- bugbear
- bugger
- build
- build up
- builder
- bullring
- bumble bee
- bumbling
- burden
- burgeon
- burglar
- burial ground
- bush fighting
- bushel
- busily
- business hours
- businessman, businesswoman
- butteress
- buttermilk
- buttock
- button
- buttonhole
- by a narrow margin
- by all odds
- by degrees
- by the minute
- by-gone age
- by-law
- bye-law
- band
- befogged
- belle
- believe
- believe in
- below