sing - smoo
- sing-sing
- singeing
- singeing machine
- singing
- singing flame
- singing margin
- single
- single address computer
- single anticline
- single arch
- single arrival
- single beam
- single bond
- single breadth of wallpaper
- single cable
- single cable system
- single carriageway
- single carry
- single censoring
- single circuit
- single circuit line
- single conductor cable
- single conduit
- single connection
- single cord
- single correlation
- single cross
- single crystallization
- single current
- single cut
- single deal frame
- single dislocation
- single door
- single drawing
- single duct
- single duct air conditioning system
- single error detection
- single event
- single experiment
- single face
