- Brown colour
- Brown horse
- Brown-coloured
- Bruhaspathi
- Brunch
- Brush
- Brush oneself down
- Brusquely
- Brutal
- Brutally cruel
- Brute
- Brutify
- Brutish
- Brutus
- Bubo
- Buck up
- Buddle
- Buddy
- Budge
- Budget
- Budgeted
- Buffeting
- Buffoonery
- Buggy
- Build bridges
- Built
- Built-in
- Bulbous
- Bulk storage
- Bull in a china shop
- Bull-calf
- Bulldozer
- Bullfrog
- Bullion
- Bullock
- Bumble
- Bummer
- Bumper
- Bumpy
- Bun
- Bungle
- Bunt
- Buoy
- Buoyant
- Burble
- Burden
- Bureacratic
- Bureaucrat
- Burger
- Burka
- Burn
- Burn down
- Burn out
- Burn the midnight oil
- Burning fire
- Buttress
- Burnt offerings to agni
- Burp
- Burr
- Burrow
- Burrow into
- Bursa
- Burying place
- Bushed
- Bushmeat
- Business tax
- Buss
- Bust l
- Bust up
- Busted
- Bustle
- Busy
- Busy bee
- Butchery
- Butea frondos
- Butt end
- Butte
- Butteress
- Button
- Buxom
- Buy for a song
- Buy in
- Buy over
- Buyout
- Buzzer
- By a narrow margin
- By all means
- By far
- By fire
- By force
- By heart
- By hook or by crook
- By leaps and bounds
- By night
- By present day standards
- By the sweat of ones brow
- By the way
- By the yard
- By way of
- By word