- lateral strain
- lateral support
- lateral thrust
- lateral truss
- lateritic soil
- latex paint
- lath
- lathed ceiling
- lathing
- latin cross
- latitude
- lattice beam
- lattice bracing
- lattice fence
- lattice girder
- lattice jib
- lattice purlin
- lattice tower
- lattice window
- latticed
- latticed column
- latticed post
- latticed web
- launching arrangement
- launching roller
- launching vehicle
- laundry
- laundry room
- lava ash
- lavatory seat
- lay
- layer board
- layer corrosion
- layer winding
- layered embankment
- leaching trench
- lead curve
- lead story
- lead wire
- leaded glass
- leader hopper
- leading process
- leaf
- leaf bucket
- leak
- leak detection
- leakage loss
- leakage path
- leakage test
- leaning
- learn
- lease
- leaving air
- lecture hall
- ledge
- ledger board
- ledger plate
- ledger stringer
- lee
- leeward opening
- leeway
- left back
- left view
- legendary
- legibility
- lel1ticular girder bridge
- lenticular beam
- lenticular truss
- lava cone
- lavatory
- lavatory bowl
- lay off
- lay under
- laying off
- layout component
- layout drawing
- layout module
- leaching
- lead
- lead gloves
- lead light
- lead lining
- lead plug
- lead rail
- lead slag
- lead tack
- leader head
- leading edge
- leading jetty
- leaf dam
- leak detector
- leakless
- leaky tap
- lean clay
- leaning tower
- least
- ledge door
- ledged door
- leeward
- left bank