The phrase "smash down" typically refers to forcefully breaking or crushing something. Some synonyms for this phrase include "destroy," "shatter," "obliterate," "demolish," "crush," and "flatten." Each of these words implies a similar level of forceful destruction, with some focusing more on the physical breaking apart of an object and others emphasizing the complete annihilation of the item. Other possible synonyms for "smash down" include "pulverize," "wreck," "raze," "decimate," "annihilate," and "level." Regardless of the specific word used, all these synonyms convey the notion of a powerful and destructive impact.