| Atomuhr | atomic clock |
| atomar | atomic |
| Atom | atom |
| Atomkern | atomic nucleus atomic core nucleus |
| Atommüll | nuclear waste radioactive waste |
| Turmuhr | tower clock |
| Abfuhr | removal rebuff |
| Aufruhr | riot turmoil tumult uproar |
| Ausfuhr | export |
| Stoppuhr | stopwatch |
| Atomnummer | atomic number |
| Atopie | atopy |
| atonal | atonal |
| Atoll | atoll |
| Atombunker | nuclear fall-out shelter |
| Atomhülle | atomic shell electron shell |
| Atommacht | nuclear power |
| Atommine | atomic demoliton munition |
| Atompilz | mushroom cloud |
| Atomstrom | electricity generated by nuclear power |