• birdsong,
• virdsong,
• nirdsong,
• hirdsong,
• girdsong,
• burdsong,
• bjrdsong,
• bkrdsong,
• bordsong,
• b9rdsong,
• b8rdsong,
• birddong,
• birsdong,
• byrdsong,
• bardsong,
• birtsong,
• birdsone,
• Byrthsong,
• birdog,
• Barnsong

• bird dog,
• bird shot,
• bird's nest,
• birdsell,
• birdseed,
• birdsall.

The adjective form of "birdsong" is "birdsong".

The plural of the "birdsong" can be the "birdsongs".

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