| Brutkasten | incubator |
| Brutkastenlüge | Nayirah’s testimony |
| Brotkasten | breadbox bread bin |
| Baukasten | building blocks |
| brunsten | rut |
| brüsten | boast brag gloat |
| Nistkasten | birdhouse |
| Postkasten | collection box drop box letter box mailbox postbox letterbox mail slot |
| Spülkasten | cistern |
| Bierkasten | beer crate crate of beer |
| Briefkasten | mailbox postbox collection box drop box letter box letter-box |
| Radkasten | wheel housing |
| brokaten | brocaded |
| Brutstätte | hotbed |
| Brüten | sitting |
| brüten | brood |
| brunften | rut |
| abrüsten | disarm take the scaffolding down |
| brüskieren | affront |
| Blutkuchen | blood clot |