silica gel - sliplining
- single-storey building
- single-storey heating system
- single-strand cable
- single-strut trussed beam
- single-thread screw
- single-track automatic block system
- single-track railroad
- single-track tunnel
- single-use formwork
- single-valued
- single-wall cofferdam
- single-way railroad
- single-wrap elevator
- single-zone air-conditioning system
- singles
- sink
- sink bib
- sink outlet
- sink unit
- sinker