- mortar screed
- mortar spreading
- mortared stonework
- mortice axe
- mortice lock
- morticing
- mortise
- mortise machine
- mortised
- mosaic
- mosaic floor
- mosaic glass
- mosaic parquet
- mosaic structure
- mosque
- most
- most upstream
- motel motel
- mother lode
- motif
- motor accident
- motor caravan
- motor depot
- motor roller
- motor sweeper
- motordrome
- motorization rate
- motorized mean
- mottled surface
- mould
- moulded castings
- moulded concrete
- moulded plywood
- mound breakwater
- mountain chain
- mountain province
- mountain relief
- mountain shelter
- mountain slope
- mountain stream
- mountainous country
- mounting accessory
- mounting bolt
- mounting roller
- mouth bar
- movable bridge
- movable hinge
- movable jaw
- movable partition
- movable screen
- movable span
- movement area
- moving construction
- moving forms
- moving frames
- moving moraine
- moving ramp
- mucker
- mud
- mud bailing
- mud crack
- mud dredge
- mud dredging
- mud injection
- mud seal
- mud store
- mud sump
- mud tap
- mud trap
- mud wall
- mudding
- muddying
- mudsill
- multi-layer
- multibranch fitting
- multibucket ditcher
- multicenter curve
- multicolor brick
- multicore panel
- multicycle prestressing
- multideck screen
- multiflight stairs
- multilattice
- multilayer deposition
- multilayer plywood
- multileaf gate
- multilinkage domain
- multiobjective network
- multiple
- multiple echo
- multiple integrals
- multiple mold
- multiple seismometer
- multiprogram computer
- multirow glazing
- multislope roof
- multispan
- multispan truss
- multitier framework
- moisture room