- suspended sludge
- suspended state
- suspended wall
- suspension
- suspension colloid
- suspension fallout
- suspension polymerization
- suspension system
- suspensoid
- swab
- swabbing
- swag
- swage nipple
- swallow-hole
- swamp ore
- swarm earthquake
- sweat damp
- sweating
- sweating process
- sweating room
- sweating tunnel
- swedged nipple
- sweep efficiency
- sweeping machine
- sweet
- sweet crude
- sweet gasoline
- sweeten
- sweetening
- sweetening inhibitor
- sweetening tray
- sweetening treating
- sweetgum
- swelling
- swelling agent
- swelling clay
- swelling ground
- swelling index
- swelling pressure
- swing post
- swirl
- switch box
- swing pipe
- swivel head
- swivel neck
- syenitic
- synantetic
- synchronous deposit
- synclinal closure
- synclinal lake
- synclinor
- synthetic elastomer
- synthetic gasoline
- synthetic process
- szaibelyite
- szomolnokite
- T-iron
- table reef
- tableting
- tacheometric survey
- tachymetry
- tack range
- tacky grease
- taeniolite
- tailings
- take
- take fire
- talcky limestone
- tall water
- tallow
- tallow oil
- tan ball
- tank
- tank design
- tank farm
- tank sludge
- tank top
- swivel
- swivel hook
- sympathetic strike
- synclinal valley
- synclinorium
- synthesis cycle
- synthetic detergent
- synthetic fuel
- synthetic latex
- synthetic plastic
- synthetic record
- syntonin
- system control
- tab washer
- table slate
- table structure
- tablet
- tack welding
- tackiness agent
- tactility
- tail house
- tailing
- take over