The phrase "come down buckets" is often used to describe heavy rainfall. However, there are several other synonyms that can be used to convey the same meaning. Some common phrases include "rain cats and dogs," "pouring rain," "torrential downpour," and "heavy precipitation." These terms all suggest a significant amount of rain falling from the sky. Other synonyms that indicate a moderate amount of rain include "drizzle," "light shower," and "sprinkle." Regardless of the level of rainfall, these terms offer plenty of variety to describe weather conditions for writers and speakers alike.