1. A birch.

Nuttall's Standard dictionary of the English language By Nuttall, P.Austin

• birck,
• berke,
• byrk,
• byrke,
• burke,
• virk,
• bkrk,
• b9rk,
• bi5k,
• bi4k,
• birj,
• vbirk,
• bvirk,
• nbirk,
• bnirk,
• hbirk,
• gbirk,
• bgirk,
• bjirk,
• bijrk

• bierce,
• birks.

The adjective form of the word "Birk" is "Birken".

The plural of the "Birk" can be the "birks".

The singular of the "Birk" can be the "Birk".