Blowing up is a term that is often used to describe an explosion of some kind. However, there are multiple synonyms for this phrase that can help you better articulate the specific type of explosion or reaction you are describing. Substitute words for blowing up include detonating, erupting, bursting, popping, exploding, booming, blasting, and igniting. Each of these words can create a different image in the reader's mind and can be used in a variety of contexts. By using these synonyms, you can add depth and clarity to your language and create a more vivid and engaging piece of writing.