| sketch | sketch |
| sketch satírico | skit |
| skibob | skibob |
| Skikda | Skikda |
| Skills Challenge | Skills Challenge |
| Skimmia | Skimmia |
| Skimming | Skimboarding |
| Skinfaxi y Hrímfaxi | Skinfaxi and Hrímfaxi |
| Skinhead | Skinhead |
| Skinheads Against Racial Prejudice | Skinheads Against Racial Prejudice |
| Skinny Client Control Protocol | Skinny Client Control Protocol |
| Skip list | Skip list |
| Skiptvet | Skiptvet |
| Skirnir | Skirnir |
| Skogskyrkogården | Skogskyrkogården |
| Skolelinux | Skolelinux |
| Skoll | Skoll |
| Skonto FC | Skonto FC |
| Skopie | Skopje |
| Skopje | Skopje |
| Skorenovac | Skorenovac |
| Skrull | Skrull |
| SKS | SKS |
| Skuld | Skuld |
| Skule Bårdsson | Skule Bårdsson |
| Skunk Works | Skunk works |
| Sky News | Sky News |
| Sky Tower | Sky Tower |
| SkyDSL | SkyDSL |
| Skye | Skye |
| Skylab | Skylab |
| Skynet | Skynet |
| SkyTeam | SkyTeam |
| Skáldskaparmál | Skáldskaparmál |
| Skálholt | Skálholt |
| Skírnismál | Skírnismál |
| Skíðblaðnir | Skíðblaðnir |
| Skópelos | Skopelos |
| Skövde | Skövde |
| skúa | great skua |
| SL | SL |
| Slaanesh | Slaanesh |
| Slab | Slab allocation |
| Slackware | Slackware |
| Slash | Slash |
| Slasher | Slasher film |
| Slava | Slava |
| Slavia Praga | SK Slavia Prague |
| slavista | Slavicist |
| Slavoj Žižek | Slavoj Žižek |
| SLAX | SLAX |
| Slayer | Slayer |
| SLBM | Submarine-launched ballistic missile |
| Sleeping With Ghosts | Sleeping with Ghosts |
| Sleepless in Seattle | Sleepless in Seattle |
| Sleepy Hollow | Sleepy Hollow |
| Sleipnir | Sleipnir |
| Slieve League | Slieve League |
| Sligo | Sligo |
| Slim Thug | Slim Thug |
| slip | briefs |
| Slipmat | Slipmat |
| Slobodan Milošević | Slobodan Milošević |
| Slobodan Rajković | Slobodan Rajković |
| slogan | slogan |
| Slonim | Slonim |
| Slot | Slot car |
| Slotsholmen | Slotsholmen |
| Slovak Airlines | Slovak Airlines |
| Slovan Bratislava | ŠK Slovan Bratislava |
| Slovenj Gradec | Slovenj Gradec |
| Slovio | Slovio |
| Slow-start | Slow-start |
| SLR | Single-lens reflex camera |
| SLS Linux | Softlanding Linux System |
| Sluc | SLUC |
| Sludge metal | Sludge metal |
| Sly and Robbie | Sly and Robbie |
| SMA | SMA connector |
| Small Computer System Interface | SCSI |
| Small Faces | Small Faces |
| Small Time Crooks | Small Time Crooks |
| Smallanthus sonchifolius | Yacón |
| Smallville | Smallville |
| Smallville episodios | List of Smallville episodes |
| Smara | Smara |
| Smart client | Smart client |
| Smart Forfour | Smart Forfour |
| Smartmob | Smart mob |
| smash | smash |
| Smash TV | Smash TV |
| Smaug | Smaug |
| Smbat Lputian | Smbat Lputian |
| SMED | Single Minute Exchange of Die |
| Smells Like Teen Spirit | Smells Like Teen Spirit |
| SMERSH | SMERSH |
| Smetana | Smetana |
| SMF | Simple Machines Forum |
| Smif-N-Wessun | Smif-n-Wessun |
| SMIL | Synchronized Multimedia Integration Language |
| Smilacaceae | Smilacaceae |
| SMILES | Simplified molecular input line entry specification |
| Smiling Buddha | Smiling Buddha |
| Smilodon | Smilodon |
| Smirnoff | Smirnoff |
| SMiShing | SMiShing |
| Smith | Smith |
| Smithsonian Folkways Recordings | Folkways Records |
| smithsoniano | Smithsonian |
| Smithsonita | Zinc-spar |
| smog | smog |
| Smoke on the Water | Smoke on the Water |
| smoking | black tie |
| Smolensk | Smolensk |
| Smoochy | Death to Smoochy |
| SmoothWall | SmoothWall |
| SMPP | Short message peer-to-peer protocol |
| SMS Dresden | SMS Dresden |
| SMS Emden | SMS Emden |
| Smurf ataque | Smurf attack |
| Småland | Småland |
| Smörgåsbord | Smörgåsbord |
| SN Brussels Airlines | SN Brussels Airlines |
| Snaer | Snær |
| Snake | Snake |
| Snake Jailbird | Snake Jailbird |
| Snakeboard | Snakeboard |
| Snakefinger | Snakefinger |
| SNC | CNS |
| SNCB | National Railway Company of Belgium |
| SNCF | SNCF |
| Snickers | Snickers |
| snippet | snippet |
| SNK | SNK Playmore |
| snob | snob |
| Snobol | SNOBOL |
| snocross | snocross |
| snooker | snooker |
| Snoop Dogg | Snoop Dogg |
| Snoopy | Snoopy |
| Snorri Sturluson | Snorri Sturluson |
| Snotra | Snotra |
| Snow Crash | Snow Crash |
| snowboard | snowboarding |
| Snuff movies | Snuff film |
| Snæfellsjökull | Snæfellsjökull |
| Sněžka | Sněžka-Śnieżka |
| so | lower |
| so ar | dream |
| So capa de | Under the cover of |
| so oliento | drowsy |
| So pretexto de | On the plea |
| So So Def | So So Def Recordings |
| SO-DIMM | SO-DIMM |
| SOAP | SOAP |
| soasado | underdone |
| soasar | sear |
| Soazza | Soazza |
| sobaco | armpit |
