| Briefkastenfirma | shell corporation |
| Briefkastenonkel | advice columnist |
| Briefkastentante | advice columnist |
| Briefkasten | mailbox postbox collection box drop box letter box letter-box |
| Briefmarkenfalz | stamp hinge |
| Briefzusteller | letter carrier |
| Briefzustellerin | letter carrier |
| Kastenform | tin |
| Bierkasten | beer crate crate of beer |
| Briefklemmer | bulldog clip |
| Briefmarkenautomat | vendor |
| Briefmarkenkunde | philately |
| Brieftaubensport | pigeon racing |
| Briefmarkenalbum | stamp album |
| Briefpapier | letter paper |
| Brotkasten | breadbox bread bin |
| Brutkasten | incubator |
| Brutkastenlüge | Nayirah’s testimony |
| Dikasterium | dicastery |
| Leierkasten | barrel organ |