The word "deuces" is often used as a slang term to say goodbye or farewell. However, there are several synonyms that can be used interchangeably with this word. Some of the most common synonyms that are used to mean goodbye or farewell include "goodbye," "farewell," "adios," "bye-bye," and "so long." Other synonyms that can be used to indicate leaving or departing include "exit," "parting," "leaving," and "departing." Regardless of which synonym is used, the underlying sentiment remains the same - a departure or a farewell.