| situação embaraçosa | difficult situation |
| situação escorregadia | condition |
| situação financeira | condition |
| situaçãoha | state |
| Siula Grande | Siula Grande |
| Siv | Simian immunodeficiency virus |
| Siva | Shiva |
| Sivas | Sivas Province |
| Sivatherium | Sivatherium |
| Siviriez | Siviriez |
| Six Feet Under | Six Feet Under |
| sizígia | syzygy |
| sizígia (astronomia) | syzygyskateboard |
| Siágrio | Syagrius |
| Sião | Zion |
| Siãoarlha | Zionssnd So |
| siú | Sioux |
| Sjöbo | Sjöbo Municipality |
| SK | SK |
| SK Kladno | SK Kladno |
| SK Rapid Wien | SK Rapid Wien |
| Ska punk | Ska punk |
| Skadarlija | Skadarlija |
| Skade | Skaði |
| Skagen | Skagen |
| Skagerrak | Skagerrak |
| Skalica | Skalica District |
| Skanderbeg | Skanderbeg |
| Skanderborg | Skanderborg |
| Skane | Scania |
| Skara | Skara Municipality |
| Skara Brae | Skara Brae |
| Skaraborg | Skaraborg County |
| Skarn | Skarn |
| skate | skateboard |
| Skate punk | Skate punk |
| skateglha | skate |
| Skaun | Skaun |
| Skedsmo | Skedsmo |
| Skellefteå | Skellefteå Municipality |
| sketch | sketch |
| SketchUp | SketchUp |
| Skibby | Skibby |
| skibob | skibob |
| Skikda | Skikda |
| Skimmia | Skimmia |
| Skinhead | Skinhead |
| Skinhead nazista | White power skinhead |
| Skinheads Against Racial Prejudice | Skinheads Against Racial Prejudice |
| Skiplist | Skip list |
| Skiptvet | Skiptvet |
| Skive | Skive municipality |
| Skiðblaðnir | Skíðblaðnir |
| Skjern | Skjern |
| Skjervøy | Skjervøy |
| Skjåk | Skjåk |
| Skoda | Škoda Auto |
| Skodje | Skodje |
| Skolelinux | Skolelinux |
| Skolemização | Skolem normal form |
| Skoll | Skoll |
| Skonto FC | Skonto FC |
| Skopie | Skopje |
| Skopje | Skopje |
| Skovbo | Skovbo municipality |
| Skrapar | Skrapar District |
| Skræling | Skræling |
| Skuld | Skuld |
| Skull and Bones | Skull and Bones |
| Skunk Ape | Skunk ape |
| Skurup | Skurup Municipality |
| SKY | SKY Latin America |
| Sky Captain and the World of Tomorrow | Sky Captain and the World of Tomorrow |
| Sky Tate | Sky Tate |
| Sky Tower | Sky Tower |
| SkyEurope Airlines | SkyEurope |
| Skylab | Skylab |
| skyline | skyline |
| skyrmion | skyrmion |
| Skyteam | SkyTeam |
| Skálholt | Skálholt |
| Skåne | Scania |
| Skånland | Skånland |
| Skælskør | Skælskør municipality |
| Skærbæk | Skærbæk |
| Skævinge | Skævinge |
| Skënderbeu Korçë | KS Skënderbeu Korçë |
| Skíros | Skyros |
| Skørping | Skørping |
| SL | SL |
| Slackware Linux | Slackware |
| Slagelse | Slagelse municipality |
| slalom | slalom |
| Slam Dunk Contest | Slam Dunk Contest |
| Slangerup | Slangerup |
| Slash | Slash |
| Slava Polunin | Slava Polunin |
| Slavia Praga | SK Slavia Prague |
| Slavia Sofia | PFC Slavia Sofia |
| Slavica Ecclestone | Slavica Ecclestone |
| Slavoj Žižek | Slavoj Žižek |
| SLAX | SLAX |
| Slayer | Slayer |
| Sleep Is the Enemy | Sleep Is the Enemy |
| Sleeping Murder | Sleeping Murder |
| sleeping-acomodação | sleeping-accomodation |
| sleeping-lugar | sleeping-place |
| Sleepless in Seattle | Sleepless in Seattle |
| Sleepy Hollow | Sleepy Hollow |
| Sleipnir | Sleipnir |
| slide | slide |
| slide colorido | slide |
| Sligo | Sligo |
| Slim Thug | Slim Thug |
| Sliven | Sliven |
| slivovitz | slivovitz |
| Slobodan Milošević | Slobodan Milošević |
| Slobozia | Slobozia |
| slogan | slogan |
