swep - tapp
- swept
- swept wing
- swept-back
- swept-forward
- sweptback wing
- sweptforward wing
- swerve
- swing tail
- swinging
- swirl
- swirl plate
- swirl vane
- swirl-type nozzle
- swirler
- swirling
- switch
- switch bar
- switch box
- switch guard
- switch lever guard
- switch starter
- switch-through technique
- switchboard
- switching circuit
- switching device
- switching system
- swivel
- swivel connection
- swivel coupling
- swivel coupling unit
- swivel gland
- swivel mirror
- swivel pipe
- swivel seat
- swiveling nozzle
- swivelling
- syllabus
- symbol
- symmetric flap extension
- symmetric flap operation