| Substitut | surrogate |
| Substitution | substitution replacement |
| Substituent | substituent |
| Substrat | substrate |
| Institut | institute institution institution building legal institution |
| Subskript | subscript |
| Subkultur | subculture |
| Subsidium | subsidy |
| Substantiv | noun substantive noun substantive naming word |
| Substanz | substance stuff |
| Subsystem | subsystem |
| Subtilität | subtleness |
| subito | at once |
| subtil | subtle |
| Rübstiel | turnip greens |
| Selbstlaut | vowel |
| obstinat | obstinate |
| Justinus | Justin |
| Wüstit | wüstite |
| Solstitium | solstice |