| birken | birchen |
| Birke | birch |
| Birkenbaum | birch tree |
| Birkenhain | birch grove |
| Birkenholz | birch wood |
| Birkenlaub | birch leaves |
| Birkenmaus | birch mouse |
| Birkenpech | birch pitch birch tar |
| Birkenpilz | birch bolete rough-stemmed bolete scaber stalk |
| Birkenrute | birch rod |
| Birkensaft | birch sap |
| Birkenteer | birch pitch birch tar |
| Birkenwald | birch forest birch grove |
| Wirken | legacy |
| wirken | work act operate take effect appear seem knit |
| biken | bike |
| Birkenfeige | weeping fig Benjamin's Fig Java fig benjamin-tree |
| Birkenhäher | european roller blue roller nutcracker spotted nutcracker eurasian nutcracker |
| Birkenleder | birch bark birchbark |
| Birkenmeise | Brown Crested Tit Grey Crested Tit |