Synonyms of 'flotsam'
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Debris is pieces from something that has been destroyed or pieces of rubbish or unwanted material that are spread around.
People were killed by flying debris.
Detritus is the small pieces of rubbish that remain after an event has finished or when something has been used.
burnt-out buildings, littered with the detritus of war
Junk is old and used goods that have little value and that you do not want any more.
What are you going to do with all that junk?
Thesaurus for flotsam from the Collins English Thesaurus
Flotsam is rubbish , for example bits of wood and plastic, that is floating on the sea or has been left by the sea on the shore .