Stam - Stoi
- Stamping
- Standard
- Standardization
- Standing start
- Starter (starting engine)
- Starter cable
- Starting gear
- Starting handle
- Starting switch
- State coach
- Station wagon
- Stator
- Steady rest bearing
- Steam engine
- Steering
- Steering arm
- Steering box (steering-gear box)
- Steering column
- Steering column energy absorber
- Steering damper
- Steering gear
- Steering knuckle
- Steering knuckle pin
- Steering lock
- Steering lock angle
- Steering reduction ration
- Steering stop
- Steering wheel
- Steering wheel slack
- Steering worm sector
- Stellite
- Stepless transmission
- Stepped piston
- Sterling engine
- Sticking of piston ring
- Sticking of valve
- Stock production
