- breakway torque
- breast wheel
- breath valve
- breather
- breathing capacity
- breeding
- breeding cycle
- breeding-fire
- breeze concrete
- bremsstrahlung
- Brewster angle
- brick arch
- brick clay
- brick field
- brick press
- brick vault
- bricklaying
- brickwork casing
- brickyard
- bridge abutment
- bridge circuit
- bridge crane
- bridge deck
- bridge girder
- bridge pier
- bridge rectifier
- bridge transformer
- briefing
- bright
- brightness contrast
- brightness temperature
- brilliance glaze
- brilliant luster
- brim
- brine ice
- brine mixer
- brine refrigeration
- brine reservoir
- briquet
- brittle core
- Brittle Fracture
- brittle program
- brittleness
- broach ram
- broaching
- broaching tool
- broadband aerial
- broadcast band
- broadcast journalism
- broadcasting right
- broadcasting schedule
- broadening
- broadleaf wood
- broken fold
- broken ground
- broken line
- broken plateau
- broken rocks
- broker
- bromatology
- bromide print
- bromine
- bronzing
- brown
- browse
- Brunton compass
- brush spring
- brusher
- brushing
- brushwood work
- bubble cap
- bubble concrete
- bubble gum
- bubble storage
- bubbling
- bubbly
- buck stay
- bucker
- bucket chain
- bucket engine
- bucket piston
- brine level
- brine solution
- bring
- bring to
- bring up
- brinle surface
- brittle
- broaching machine
- broad chisel
- broad-caster
- broadband horn
- broadcast videographics
- broadcasting satellite
- broadgauge
- broadstep
- broken ice
- broken rice
- broken seed
- broken-up