A Bacchanalian Bash is a wild and extravagant celebration, usually involving excessive drinking and revelry. It is named after the Roman god of wine, Bacchus, and is often associated with ancient Greek and Roman festivals. The two crossword solutions for this term are 'orgy' and 'REVEL', both of which accurately describe the type of event. An orgy is an unrestrained gathering involving sexual activity, while a REVEL is a lively and noisy party. Both words accurately capture the essence of a Bacchanalian Bash.