- Bonnets
- Bonvivant
- Booby prize
- Booby trap
- Booed
- Book club
- Book learning
- Book-keeper
- Book-learned
- Bookcase
- Bookpost
- Boom
- Boomerang
- Boonteous
- Boorish
- Booster
- Boot
- Boot strapping
- Booth
- Booting
- Bootlace
- Borborygmus
- Bordello
- Borderland
- Bordetella pertussis
- Bore
- Bored
- Born
- Boss
- Botanical
- Botany
- Botch
- Bottle gourd
- Bottom out
- Bottomless
- Boudoir
- Bought
- Bouillon
- Bound across
- Boundary line
- Bouquet of flowers
- Boutique
- Bow-wow
- Bowed
- Bowing
- Box
- Boy
- Boycott
- Boys
- Brace
- Brackishness
- Bract
- Bradycardia
- Brahmin military generals
- Brahminy kite
- Braid
- Brain trust
- Brains
- Brake horsepower
- Branches of betel vine
- Brandy
- Brash
- Bravado
- Brave
- Bravery
- Bravura
- Brawn
- Bread and butter
- Bread the ice
- Breadthwise
- Break a jest
- Break a promise
- Break even
- Break in
- Break on the wheel
- Break point
- Break silence
- Break stones
- Break to pieces
- Break water
- Breaker
- Breakfast
- Breaking
- Breakout
- Breast
- Breast milk
- Breast movement
- Breast plate
- Breast-high
- Breath
- Breathless
- Breech
- Brew
- Brewery
- Brewing
- Bribe
- Bribes
- Brickyard
- Bridgroom
- Brief