Synonyms of 'debacle'
A catastrophe is an unexpected event that causes great suffering or damage.
The world is heading towards an environmental catastrophe.
If you refer to something as a disaster, you are emphasizing that you think it is extremely bad or unacceptable.
The whole production was a disaster.
If you describe an event or attempt to do something as a fiasco, you are emphasizing that it fails completely.
The party was a bit of a fiasco.
Thesaurus for debacle from the Collins English Thesaurus
A debacle is an event or attempt that is a complete failure .