| sibilino | sibylline |
| sibilo | hiss |
| Sibirskiy tsiryulnik | The Barber of Siberia |
| Sibiu | Sibiu |
| Siblingen | Siblingen |
| Sibutramina | Sibutramine |
| Sibéria | Siberia |
| sic | sic |
| Sicana | Sicana odorifera |
| Sicherheitsdienst | Sicherheitsdienst |
| Sicheus | Sychaeus |
| Sichuan | Sichuan |
| Siciliana | Sicilian |
| siciliano | Sicilian |
| Sicião | Sicyon |
| Sick of It All | Sick of It All |
| Sickerode | Sickerode |
| siclo | shekel |
| sicofanta | sycophant |
| sicofantaa | sycophant So |
| Sicrano | Tom, Dick and Harry |
| sicranolha | Mr. So and So |
| Sicília | Sicily |
| sicómoro | sycamore |
| sicômoro | sycamore |
| Sid e Marty Krofft | Sid and Marty Krofft |
| Sid Meier | Sid Meier |
| Sid Vicious | Sid Vicious |
| Sid Wilson | Sid Wilson |
| SIDa | AIDS |
| Sidarta | Siddhartha |
| Siddhartha Gautama | Gautama Buddha |
| side-car | side car |
| sideral | sidereal |
| Sideriano | Siderian |
| Sideritis | Sideritis |
| siderurgia | ironwork industry |
| Siderurgia de Völklingen | Völklinger Hütte |
| Sideshow Bob | Sideshow Bob |
| Sidi Bel Abbes | Sidi Bel Abbes |
| Sidi Bou Said | Sidi Bou Zid Governorate |
| Sidney | Sydney |
| Sidney Crosby | Sidney Crosby |
| Sidney Poitier | Sidney Poitier |
| Sidney Sheldon | Sidney Sheldon |
| Sidom | Sidon |
| Sidon | Sidon |
| sidoncelha | beenowe |
| sidra | cider |
| Sidur | Siddur |
| sidéreo | sidereal |
| Sidónio Pais | Sidónio Pais |
| Sidônio Apolinário | Sidonius Apollinaris |
| Siebel Systems | Siebel Systems |
| Siedlce | Siedlce |
| Sieg heil | Sieg Heil |
| Siegbert Tarrasch | Siegbert Tarrasch |
| Siegelsbach | Siegelsbach |
| Siegen | Siegen |
| Siegen-Wittgenstein | Siegen-Wittgenstein |
| Siegenburg | Siegenburg |
| Siegessäule | Berlin Victory Column |
| Siegfried | Siegfried |
| Siegfried de Dubhe | Dubhe Alpha Siegfried |
| siemens | siemens |
| Siemens AG | Siemens AG |
| Siena | Siena |
| siena (cor)e corda) | bufflis |
| Sienna Guillory | Sienna Guillory |
| Sienna Miller | Sienna Miller |
| Sieradz | Sieradz |
| Sierra Madre del Sur | Sierra Madre del Sur |
| Sierra Madre Occidental | Sierra Madre Occidental |
| Sierra Madre Oriental | Sierra Madre Oriental |
| Sierra Nevada | Sierra Nevada |
| Sierra Nevada de Lagunas Bravas | Sierra Nevada de Lagunas Bravas |
| Sierre | Sierre |
| Siete Aguas | Siete Aguas |
| sievert | sievert |
| Sif | Sif |
| sifilítica | syphilitic |
| sifilítico | syphilitic |
| sifão | siphon |
| siga | follow |
| siga (tipo de corda) | warpnge |
| Sigdal | Sigdal |
| Sigeberto I | Sigebert I |
| Sigeberto II | Sigebert II |
| Sigeberto III | Sigebert III |
| Sigerico | Sigeric |
| Sigfrid Karg-Elert | Sigfrid Karg-Elert |
| Sigfrido da Suécia | Sigfrid of Sweden |
| Sighişoara | Sighişoara |
| Sigillaria | Sigillaria |
| sigilo | secrecy |
| sigilo profissional | professional secrecy |
| sigilosamente | secretly |
| sigiloso | stealthy |
| sigilosoo | meaning |
| SIGINT | SIGINT |
| Sigirino | Sigirino |
| Sigismundo II da Polônia | Sigismund II Augustus |
| Sigismundo III da Polônia | Sigismund III Vasa |
| siglagem | acronymization |
