The phrase "batter down" means to break down or destroy something. Synonyms for "batter down" include "smash," "demolish," "topple," "wreck," "flatten," "ruin," "level," "crush," "razz," and "shatter." These words all convey a sense of force and destruction, and are typically used when describing the collapse of a physical structure or the defeat of an opponent. Each of these synonyms for "batter down" offers a slightly different nuance, depending on the context in which it is used. However, all evoke a sense of power and impact that can be both destructive and awe-inspiring.