What is a antonym for the word Debut?

There isn't a single perfect antonym for "debut," as its meaning can vary depending on the context. Here are some options, depending on the intended meaning:

For "first public appearance":

* Retirement

* Farewell

* Last performance

* Exit

* End

For "first public release":

* Recall

* Discontinuation

* Withdrawn

* Removed

For "first time being introduced":

* Familiarization

* Reunion

* Reintroduction

It's important to consider the specific context in which you're using the word "debut" to choose the most appropriate antonym.