| Alternativhypothese | alternative hypothesis |
| Arbeitshypothese | working hypothesis |
| Alternativplan | contingency plan |
| Alternative | alternative option alternative solution inclusive disjunction logical disjunction |
| alternative Fakten | alternative facts |
| Alternativmedizin | alternative medicine |
| alternativ | alternative |
| Simulationshypothese | simulation hypothesis simulation theory |
| Nullhypothese | null hypothesis |
| Urkundenhypothese | documentary hypothesis |
| Altes Ägypten | Egypt |
| altes Ägypten | Ancient Egypt |
| Internationale | Internationale |
| Hypothese | hypothesis |
| Pongidenhypothese | Pongidae hypothesis |
| Antithese | antithesis |
| Altenpflege | eldercare |
| Alter vor Schönheit | age before beauty |
| Alterssichtigkeit | presbyopia |
| Altägypten | Egypt |