- Backbiting
- Backbone
- Backcomb
- Backfill
- Backfire
- Backgammon
- Background history
- Backlist
- Backrest
- Backslide
- Backslider
- Backspace
- Backstab
- Backstage
- Backstop
- Backwash
- Backwoods
- Backyard
- Bacterioid
- Bad blood
- Bad debt
- Bad eye-sight
- Balustrade
- Bad hat
- Bad name
- Bad person
- Bad situation
- Badass
- Badly
- Badness
- Baggage-car
- Baggy
- Bagpipe
- Bailiff
- Bailiwick
- Baked
- Baked cake
- Bakelite
- Baker's dozen
- Balancing
- Balcony
- Baldpated
- Bale
- Baleful
- Balk
- Ball is in your court
- Ballast
- Ballerina
- Ballistic
- Balmy
- Bamboo seed
- Bamboo tube
- Bamboos
- Bamboozle
- Banana
- Banana peel
- Bananas
- Bandwagon
- Banister, bannister
- Banjo
- Bank balance
- Bank upon
- Bank-book
- Banlieue
- Banned
- Bannister
- Banqueting
- Banter
- Baptist
- Bar
- Barbarism
- Barbarous
- Barbed wire
- Barbers job
- Bard
- Bards
- Bare
- Barf
- Bargaining
- Bariatric
- Baritone
- Bark of trees
- Barnet
- Barometry
- Barrack
- Barren country
- Barrenness
- Barricade
- Barrier
- Bars
- Bartered goods
- Baryon
- Bascule
- Base metal
- Base person
- Base qualities
- Based
- Baseline
- Bashed
- Basilisk glance