| Sprechakttheorie | speech act theory |
| Sprachtheorie | linguistic theory theory of language |
| Chaostheorie | chaos theory |
| Spieltheorie | game theory |
| Sprachsynthese | speech synthesis |
| Sprechakt | speech act |
| Sprecherin | speaker spokeswoman |
| Eichtheorie | gauge theory |
| Graphentheorie | graph theory |
| Staatstheorie | theory of the state |
| Stammbaumtheorie | tree model |
| Stringtheorie | string theory |
| Urknalltheorie | Big Bang Theory |
| Sprachforscherin | linguist |
| Sprachmelodie | intonation |
| Sprachteil | part of speech |
| Sprechart | grammatical mood |
| Sprechfähigkeit | utterance |
| Sprechkapsel | mouthpiece |
| Sprechmuschel | mouthpiece |