- bar weir
- bar windings
- bar-lathe
- barb
- barbed drainage
- barbed nail
- barbed wire
- barchan
- bardening liquid
- bare
- bare board
- bare cable
- bare conductor
- bare electrode
- bare hill
- bare pipe
- bare wire
- bare-tube
- barefaced tenon
- bargaining
- bargaining problem
- barge
- barge course
- bargee
- bargeman
- bariated cathode
- baric
- baring
- barite
- bark
- barker
- barograph
- barometer
- barometric
- barometric pressure
- barometry
- baron
- baroscope
- barothermogram
- barothermograph
- barracks
- barrage
- barred
- barred door
- barrel
- barrel antenna
- barrel buoy
- barrel dragline
- barrel nipple
- barrel vault
- barreling machine
- barren
- barren solution
- barricades
- barrier
- barrier paint
- barrier railings
- barrier reef
- barrier shield
- barrycentrie
- barycentric
- barycentric coordinate
- basal tunnel
- basaltic layer
- bascule
- base
- base address
- base angle
- base apparatus
- base asphalt
- base board
- base camp
- base circle
- base class
- base cluster
- base coat
- base color
- base correction
- base course
- base cup
- base group
- base level
- base material
- base metal
- base net
- base number
- base ore
- base pay
- base plane
- base plate
- base pressure
- base runoff
- base shape
- base space
- base station
- base-mounted
- baseband
- baseband modem
- baseless tube
- basic