- skelp
- sketch
- sketch design
- sketch designing
- sketching
- sketching board
- skew angle
- skew arch
- skew back
- skew bridge
- skew crossing
- skew culvert
- skew joint
- skew lines
- skew nailing
- skew notch
- skew-brick
- skew-symmetric
- slab board
- slab cornice
- slab stepping
- slack hours
- slag
- slag casting
- slag flushing
- slag pelletizing
- slag pumice
- slag tartrate
- slake
- slaking machine
- slamming stile
- slat
- slate ax
- slate fracture
- slate roof
- slates
- slaty marl
- sleeper cutting
- sleeping porch
- sleeve joint
- sleeve pulley
- slender framework
- slewing mechanism
- slide gate
- sliding
- sliding blind
- sliding door
- sliding triangle
- sliding window
- slip dock
- slope
- slope erosion
- slope level
- slope peg
- slope stabilization
- sloped excavation
- sloping wall
- slot mortising
- slotted baseboard
- slotted eye
- slotted perforation
- sludge
- sludge drying
- sludge pond
- sludge scraper
- sludge tank
- sludge thickener
- sluice
- sluice dam
- sluice valve
- sluicing
- slum
- slump cone
- slump retention
- slump test
- slurry
- slype
- small deformation
- smarmy
- smift
- smoke absorption
- smoke damper
- smoke detector
- smoke test
- smooth
- smooth finish
- smooth plane
- smooth rolls
- smooth surface
- skewback hinge
- skewed connection
- skewed support
- ski station
- ski-jump
- skid
- skid prevention
- skid proof
- skid track
- skidding
- skidway