There are plenty of synonyms for the term "expressive style" that can be used to add variety and flavor to your writing. Some of the alternatives you can use include "eloquence," "articulate manner," "powerful language," "fluent prose," "impassioned delivery," "vivid expression," "compelling tone," "engaging voice," "poetic flair," "evocative language," "colorful diction," "evocative style," and "persuasive rhetoric." By using these alternative words, you can convey your message more effectively and create a greater impact on your readers or listeners. Ultimately, the key to using synonyms effectively is to choose words that best serve your purpose and can help you communicate your ideas with clarity and precision.