subs - taxi
- subwatershed
- subwave
- subway
- subweathering
- subwindow air conditioner
- subworker
- subzero oil
- subzero temperature
- succeeding arm
- succesive-approximation a-d converter
- success
- success rate
- success slot
- success/failure treatment
- succession
- succession of phases
- succession time
- successive approximation
- successive approximation calculation
- successive capture
- successive grinding tasks
- successive integration
- successive reaction
- successive refinement
- successive tool motion
- successive values
- succinaldehyde
- succinamide
- succinic acid
- succinic anhydride
- succulometer
- suck-and-blow process
- suck-through carburetor installation
- sucker rod
- sucker rod hanger
- sucker rod overshot
- sucker rod pumping
- sucker rod string
- sucker rod tongs
- sucker rod wax