There are numerous synonyms for the word "showed in" that can be used to express the same idea in different ways. Some of these synonyms include demonstrated, exhibited, displayed, revealed, exemplified, indicated, manifested, portrayed, illustrated, and proved. Each of these words has a slightly different connotation, which can add nuance to your writing and help you to better convey the meaning you intend. Additionally, using synonyms in your writing can help to prevent repetition and keep your prose fresh and engaging. So next time you find yourself stuck on the same old word, try reaching for one of these synonyms to add some variety and interest to your writing!