Antonyms of adj birken

1 sense of birken

Sense 1
birch, birchen, birken -- (consisting of or made of wood of the birch tree)

INDIRECT (VIA woody) -> nonwoody -- (not woody; not consisting of or resembling wood)

Similarity of adj birken

1 sense of birken

Sense 1
birch, birchen, birken -- (consisting of or made of wood of the birch tree)
       => woody (vs. nonwoody) -- (made of or containing or resembling wood; "woody plants"; "perennial herbs with woody stems"; "a woody taste")