- jointing adhesive
- jointing medium
- jointing plane
- jointing sealant
- jointing table
- jointless flooring
- jointy
- joist hanger
- joist head
- joy
- judgment hall
- jump
- jump distance
- jump height
- junction
- junction box
- junction gallery
- junction opening
- junctor
- justifying text
- jute
- jute rope
- juxtapose
- karat
- karst cavern
- karst valley
- katabothron
- keel molding
- keelless
- keeper
- kerb ramp
- kerf
- kerosene cutter
- key block
- key cylinder
- Italian architecture
- italian pencil
- Italian roof
- itself
- jack
- jack hammer
- jack pair
- jack rafter
- jack rib
- jack truss
- jacked pile
- jacket furnace
- jacketed
- jacketed pump
- jacking plate
- jail
- jam
- jamb
- jamb lining
- jamb stone
- japanned
- jerkinhead
- jerrycan
- jesting beam
- jet injector
- jet nozzle
- jet piercer
- jet stream
- jetcrete
- jetting
- jetting drill
- jetty
- jib
- jib crane
- jigging
- jim-wink
- jinny
- job
- job analysis
- job datum
- job site
- job trips
- joggle
- joggle piece
- join
- joiner
- joinery
- joinery facing
- joint bolt
- joint rotation
- joint strip
- joint support
- joint tie
- joint-free
- jointing tool
- jury
- k diagonal
- karst cave
- karst depression
- karst topography
- kelvil solid
- kerosene pipeline
- key area
- key brick
- key diagram