There are various synonyms for the phrase "reduce dramatically" that can be helpful for expressing the same meaning in different ways. Some of these include "sharply decrease," "significantly lower," "dramatically cut," "substantially reduce," "markedly diminish," and "massively slash." These synonyms can help add variety to your language and emphasize the severity or impact of the reduction. Whether you're writing about budget cuts, environmental conservation efforts, or medical interventions, using synonyms can enhance your writing and help convey your message more effectively. Remember to choose the synonym that best suits the context and tone of your writing.