| Sinusoid | sinusoid |
| Sinus | sine sinus |
| Sinusitis | sinusitis |
| Sienesin | Sienese |
| Sinai | Sinai |
| Sinkloch | sinkhole |
| Sinologe | sinologist |
| Sinologin | sinologist |
| Sinti | Rom |
| sind | are |
| sinnend | musing |
| sino- | Sino- |
| Sindarin | Sindarin |
| Sindhi | Sindhi |
| Sinfonie | symphony sinfonia |
| Singsang | cantilena sing-song |
| Sinnbild | allegory symbol |
| Sinologie | sinology |
| Sinto | Sinto |
| sinister | sinister |