| Strontium | strontium |
| Aeronium | Aeronian |
| Tarantium | Tarantian |
| Protium | protium |
| Tritium | tritium |
| Astronomus | astronomer |
| Strandgut | jetsam |
| Strohhut | straw hat |
| Strontianit | strontianite |
| Strömling | Baltic herring |
| Astrolabium | astrolabe |
| Astronaut | astronaut |
| Astronom | astronomer |
| Astronym | astronym |
| Strafraum | penalty area |
| Strohblume | strawflower |
| Strohhalm | straw drinking straw |
| Strom | current torrent stream |
| Strommix | electricity mix |
| Struktur | structure |