driftwood

noun2

1. •
   Floating wood that drifts with the current of a body of water.

   • Every wave on the Atlantic was like a dead seagull dragging its driftwood artillery from horizon to horizon. — 1967
2. •
   Such a piece of wood that has been cast ashore.

   • Commonly the bear makes a stand in driftwood on a bank, or on a log that has fallen into or across a stream. — 1915