- scurvy
- scuttle
- scuttlebutt
- scuzzy
- scythe
- SD
- SDI
- SDLP
- SDP
- SDRs
- SE
- sea
- SEA
- sea air
- sea anemone
- sea bass
- sea bream
- sea captain
- sea change
- sea cow
- sea cucumber
- sea dog
- sea elephant
- sea fog
- sea god
- sea green
- sea island cotton
- sea lane
- sea legs
- sea level
- sea lion
- sea mile
- sea mist
- sea otter
- sea salt
- sea scout
- sea serpent
- sea shanty
- sea slug
- sea snake
- sea trout
- sea urchin
- sea wall
- seabed
- seabird
- seaboard
- seaborne
- seacoast
- seafarer
- seafaring
- seafloor
- seafood
- seafront
- seagoing
- seagrass
- seagull
- seahorse
- seakale
- seal
- seal ring
- sealable
- sealant
- sealed
- sealed-beam
- sealed-bid
- sealer
- sealing
- sealing wax
- sea-lord
- seal-point
- sealskin
- seam
- seaman
- seamanship
- seamark
- seamed
- seamless
- seamlessly
- seamstress
- seamy
- séance
- seaplane
- seaport
- sear
- search
- search engine
- search party
- search result
- search warrant
- searchable
- searcher
- searching
- searchingly
- searchlight
- searing
- Sears Roebuck
- seascape
- seashell
- seashore
- seasick
- seasickness
- seaside
- seaside resort
- season
- season ticket
- seasonable
- seasonal
- seasonal adjustment
- seasonally
- seasoned
- seasoning
- seat
- seat belt
- -seater
- seating
- SEATO
- seat-of-the-pants
- seatwork
- seaward
- seawards
- seawater
- seawater therapy
- seaway
- seaweed
- seaworthiness
- seaworthy
- sebaceous
- Sebastian
- seborrhoea
- sebum
- Sec.
- sec
- SEC
- secant
- secateurs
- secede
- secession
- secessionist
- seclude
- secluded
- seclusion
- second
- second
- second ballot
- second base
- second best
- second chamber
- second childhood
- second class
- Second Coming
- second cousin
- second grade
- second hand
- second language
- second lieutenant
- second name
- second officer
- second sight
- second thought
- secondary
- secondary modern school
- secondary picketing
- secondary school
- secondary stress
- second-class citizen
- second-degree burn
- seconder
- second-generation
- second-guess
- second-in-command
- secondly
- secondment
- second-rate
- second-strike
- second-string
- secrecy
- secret
- secret agent
- secret police
- secret service
- secretaire
- secretarial
- secretariat
- secretary
- secretary bird
- secretary-general
- secrete
- secretion
- secretive
- secretively
- secretiveness
- secretly
- sect
- sectarian
- sectarianism
- section
- section gang
- section hand
- section mark
- sectional