- balloon tire
- balloon tyre
- ballooning
- ballot
- ballot problem
- Balmer series
- balsa wood
- balsam
- balun
- baluster
- baluster parapet
- balustrade
- bamboo fence
- bamboo lath
- bamboo stake
- banana
- banana jack
- banana orbit
- banana plug
- banana trajectory
- band
- band belt
- band brake
- band breaking
- band chain
- band chart
- band clamp
- band conveyor
- band copper
- band deviation
- band filter
- band label
- band level
- band printer
- band pulley
- band sander
- band saw
- band sealer
- band sealing
- band selector
- band separator
- band spectrum
- band switch
- band theory
- bandage
- bander
- banderole
- banding
- bands
- bandspread
- bandstand
- bandwidth
- bandwidth compression
- bang
- banister
- banisters
- banjo fitting
- bank
- bank balances
- base dimension
- base drag
- base energy
- base failure
- base film
- base flow
- base frame
- base insulator
- base line
- base mark
- base measurement
- base memory
- base node
- base notation
- base paper
- base point
- base profit
- base shoe
- base slab
- base status
- base system
- base-10 logarithm
- baseboard
- based variable
- baseline
- basement
- basement exit
- basement rock
- baseplate
- basic circuit
- basic converter
- basic data
- basic equipment
- basic fold
- basic form
- basic frequency
- basic group
- basic instruction
- basic link
- basic logic
- basic motion