Encyclopedias, Almanacs, Transcripts, and Maps
- soapberry
- soaring
- Sobat
- Sobieski, John
- Sobotka, Bohuslav
- Socho
- Social Issues Affecting America's Children
- Socialist Revolutionary party
- Socinus, Faustus
- Socinus, Laelius
- Sócrates Carvalho Pinto de Sousa, José
- Socrates Scholasticus
- sod house
- soda ash
- soda niter
- Söderberg, Hjalmar
- Söderhamn
- Söderström, Elisabeth Anna
- Södertälje
- Sodi