Synonyms of 'detritus'
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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.
Litter is rubbish that is left lying around outside.
If you see litter in the corridor, pick it up.
Rubbish consists of unwanted things or waste material such as used paper, empty tins and bottles, and waste food.
unwanted household rubbish
Thesaurus for detritus from the Collins English Thesaurus
Detritus is the small pieces of rubbish that remain after an event has finished or when something has been used.