| Scuba set | Scud | Scuderia Ferrari |
| Scudo | Sculpey | Sculptor Galaxy |
| Scurf | Scurvy | Scutellaria |
| Scutellaria barbata | Scutellaria galericulata | Scutellaria lateriflora |
| Scuttling of the French fleet in Toulon | Scylacosauria | Scylacosauridae |
| Scylacosaurus | Scyliorhinidae | Scyliorhinus tokubee |
| Scyllarus arctus | Scyphomedusae | Scyphozoa |
| Scytale | Scytalopus | Scytalopus acutirostris |
| Scytalopus affinis | Scytalopus argentifrons | Scytalopus atratus |
| Scytalopus bolivianus | Scytalopus canus | Scytalopus caracae |
| Scytalopus chocoensis | Scytalopus diamantinensis | Scytalopus femoralis |
| Scytalopus fuscus | Scytalopus griseicollis | Scytalopus latebricola |
| Scytalopus macropus | Scytalopus magellanicus | Scytalopus micropterus |
| Scytalopus novacapitalis | Scytalopus panamensis | Scytalopus parvirostris |
| Scytalopus petrophilus | Scytalopus robbinsi | Scytalopus sanctaemartae |
| Scytalopus speluncae | Scytalopus spillmanni | Scytalopus stilesi |
| Scytalopus superciliaris | Scytalopus unicolor | Scytalopus vicinior |
| Scytalopus zimmeri | Scythe | Scythia |
| Scythians | SD | SD Compostela |
| SDAT | Sde Dov Airport | SDEWES Centre |
| SDH | SDL | SDL Trados |
| SDRAM | SDS-page | SDS-PAGE |
| SDSL | SDTV | Se |
| Sea Cliff, New York | Sea eagle | Sea Eagle (missile) |
| Sea eagle missile | Sea fan | Sea foam |
| Sea level | Sea monk | Sea of Sand (film) |
| Sea otter | Sea pen | Sea Peoples |
| Sea salt | Sea Shadow (IX-529) | Sea skimming |
| Sea Skua | Sea squirt | Sea turtle |
| Sea wasp | SEA-ME-WE 4 | Seabird |
| Seabird Seeker | Seabiscuit (film) | Seaborgium |
| Seabrook, Texas | Sead Kolašinac | Seadragon Software |
| Seadrift, Texas | Seafood allergy | Seaford, Delaware |
| Seaforth, Minnesota | Seagoville, Texas | Seagram Building |
| Seagraves, Texas | Seahorse (software) | Seal |
| Seal (device) | Seal (emblem) | Seal dribble |
| Seal hunting | Seal of | Seal of Solomon |
| Seal of محافظة كفر الشيخ | Seal of غويانا الفرنسية | Sealant |
| Sealed birth records | Sealing wax | SEALs |
| Sealy, Texas | Seaman, Ohio | Seamless robe of Jesus |
| SeaMonkey | Seamus Deane | Seamus Heaney |
| Sean Astin | Sean Bean | Sean Combs |
| Sean Connery | Sean Davis (footballer) | Sean Faris |
| Sean Gullette | Sean Hayes (actor) | Sean Kilpatrick |
| Sean Murray (actor) | Sean O'Pry | Sean Patrick Thomas |
| Sean Paul | Sean Penn | Sean Richard O'Pry |
| Sean St Ledger | Sean Stone | Sean Yazbeck |
| Seann William Scott | SeaOrbiter | Seaplane |
| Seaport Centre | Search activity concept | Search algorithm |
| Search and rescue | Search engine indexing | Search engine optimization |
| Search for extraterrestrial intelligence | Searching for Sugar Man | Searcy, Arkansas |
| Searsburg, Vermont | SeaSeep | Seashell |
| Seasickness | Seaside, Oregon | Season |
| Season extension | Season finale | Seasonal breeder |
| Seasonal packaging | Seasonal thermal energy storage | SEAT |
| SEAT 1200 Sport | SEAT 124 | SEAT 124 Sport |
| SEAT 127 | SEAT 128 | SEAT 131 |
| SEAT 132 | SEAT 133 | SEAT 1400 |
| SEAT 1430 | SEAT 1430 Sport | SEAT 1500 |
| SEAT 600 | SEAT 800 | SEAT 850 |
| SEAT Alhambra | SEAT Altea | SEAT Altea Prototipo |
| SEAT Arosa | Seat belt | SEAT Córdoba |
| SEAT Cupra GT | SEAT Exeo | SEAT Fórmula |
| SEAT Fura | SEAT IBE | SEAT Ibiza |
| SEAT Inca | SEAT León | SEAT Marbella |
| Seat of Wisdom | SEAT Panda | Seat Pleasant, Maryland |
| SEAT Proto | SEAT Ronda | SEAT Tango |
| SEAT Terra | SEAT Toledo | SEAT Trans |
| SEATO | Seaton, Illinois | Seatonville, Illinois |
| Seattle | Seattle Central Library | Seattle process |
| Seattle Seven | Seattle, Washington | Seattle–Tacoma International Airport |
| Seaview SVII | Seawater | SeaWorld |
| Sečovce | Seán MacBride | Sežana |
| Seb Hines | Sebaceoma | Sebaceous epithelioma |
| Sebaceous gland | Sebacoyl chloride | Sebaldella |
| Sebastiaan Steur | Sebastian Boenisch | Sebastian Brant |
| Sebastian Cabot (explorer) | Sebastian Deisler | Sebastian Freis |
| Sebastian Giovinco | Sebastian Jung | Sebastian Junger |
| Sebastian Kehl | Sebastian Kurz | Sebastian Larsson |
| Sebastian Mielitz | Sebastian of Portugal | Sebastian Prödl |
| Sebastian Rode | Sebastian Rudy | Sebastian Schindzielorz |
| Sebastian Stan | Sebastian Tyrała | Sebastian Vettel |
| Sebastiania pavoniana | Sebastiano Rossi | Sebastiano Siviglia |
| Sebastián Abreu | Sebastián Coates | Sebastián Cristóforo |
| Sebastián Decoud | Sebastián Dubarbier | Sebastián Eguren |
| Sebastián Fernández | Sebastián González | Sebastián Piñera |
| Sebastián Rulli | Sebastián Soria | Sebastián Tagliabué |
| Sebastián Yatra | Sebastião Gilberto | Sebastião José de Carvalho e Melo, 1st Marquis of Pombal |
| Sebastião Lazaroni | Sebastien Ronzevalle | Sebastjan Cimirotič |
| Sebastopol, Mississippi | Sebatik Island | Sebeka, Minnesota |
| Sebewa Township, Michigan | Sebewaing Township, Michigan | Sebewaing, Michigan |
| Sebil (fountain) | Sebilian | Seborrhoeic dermatitis |
| Sebree, Kentucky | Sebring, Ohio | Secale |
| Secale cereale | Secale strictum | SECAM |
| Secant | Secant line | Secernentea |
| Sechuran fox | Seco, Kentucky | Second |
| Second Anglo-Afghan War | Second Apocalypse of James | Second Barbary War |
| Second Battle of al-Faw | Second Battle of El Alamein | Second Battle of Kut |
| Second Battle of Mount Hermon | Second Battle of the Marne | Second Battle of Ypres |
| Second cabinet of Mohamed Ghannouchi | Second Coming | Second Coming of Christ |
