- blowout cock
- blowpipe
- blowpipe nozzle
- blowtorch
- blue adder
- blue clay
- blue copperas
- blue heat
- blue primary
- blue vitriol
- blue-brittle
- blue-short
- blue-stone
- blueline
- blunging
- blunt chisel
- blunted cone
- blurb
- blured
- bluted conduit
- board
- board deck
- board foot
- board machine
- board measure
- board mill
- board panel
- board sheathing
- boarder
- boarding bridge
- boarding house
- boards
- boardwalk
- boast
- boasting
- boat deck
- boat spike
- boatman
- bob
- bob weight
- bobbin
- body
- body brick
- body capacitance
- body clearance
- body force
- body mold
- body mould
- body plan
- body stock
- body support
- body text
- bodyguard
- bodywork
- boehmite
- bog earth
- bog peat
- boggy
- boggy ground
- bogie
- bogie frame
- boil
- boil dry
- boiler
- boiler bedding
- boiler efficiency
- boiler flue
- boiler grate
- boiler head
- boiler house
- boiler lagging
- boiler output
- boiler rivet
- boiler room
- boiler shop
- boiler slag
- boiler temperature
- boilerplate
- boiling heat
- boiling line
- boiling plate
- boiling point
- boiling reactor
- boiling temperature
- boiling-out
- boister
- bolar
- bold cliff
- bold face
- bold print
- boldface
- boling fabric
- bollard
- bolometer
- bolster
- bolster hanger
- bolster plate
- bolt
- bolt anchor
- bolt chisel