- self-regulate
- self-starter
- self-supporting
- self-willing
- semaphore
- semi-circle
- semi-darkness
- semi-formal
- semi-graphics
- semicircular dome
- semiclosed depot
- semidry pressing
- semimember
- semiporcelain
- semiprefabrication
- semirigid duct
- semisolid bitumen
- semisolid soil
- semisulcus
- senior engineer
- senmphore signal
- sensing
- sensor
- sensual
- sepal
- separate building
- separate contract
- separating element
- separating lawn
- separating partition
- separation wall
- separing grader
- sepia
- sepulchral architecture
- sequestrate
- serene
- serial
- serial access
- serial bay
- serial column
- serial panel
- serial picture
- sericite
- segmental vault
- segregation
- seismic damage
- seismic district
- seismic exploration
- seismic hook
- seismic line
- seismic phenomenon
- seismic prospecting
- seismic stability
- seismogram
- seismometry
- selectable jumper
- Selected Bidder
- selected code
- selection rectangle
- selective floatation
- selector code
- self builder
- self loader
- self-anchorage
- self-compensation
- self-developed
- self-dumping
- Self-financing
- self-inflammability
- self-purification
- self-service
- selverge
- semantic code
- semantic information
- semi welded
- semi-detached
- semiburied pipeline
- semicircular arch
- semicircular column
- semicircular notch
- semicircular shield
- semicorrugated sheet
- semicrescent truss
- semidry molding
- semielliptical bottom
- semifilled bricklaying
- semiframe
- semigantry crane
- semigravel
- semihydrous gypsum
- semilogarithmic scale
- seminar room
- semiplane
- semirocky soil
- semitrailer spreader
- send message
- senior
- senior foreman
- seniority
- senmphore