| Subregnum | subkingdom |
| Subgenus | subgenus |
| Subraum | hyperspace subspace |
| Subbirettum | zucchetto |
| Subphylum | subphylum |
| Subsidium | subsidy |
| Sueben | Suebi |
| Rubrum | caption |
| Hubraum | piston displacement pistone swept volume |
| Signum | insignia |
| Duodenum | duodenum |
| Sternum | breastbone sternum |
| Supinum | supine |
| Suberin | suberin |
| Substitut | surrogate |
| Subjekt | subject |
| Subkultur | subculture |
| Substanz | substance stuff |
| Subsystem | subsystem |
| subfebril | subfebrile |