Broacher is a noun that refers to someone who introduces or promotes something, typically a new idea, concept, or product. Some synonyms for this term include advocate, promoter, evangelist, proponent, spokesperson, propagandist, and champion. These words all imply a sense of passion and enthusiasm in promoting or advocating for something. A broacher may be someone who shares a new idea with a group of people, pitches a product to potential customers, or advocates for a certain cause or movement. Regardless of the context, using one of these synonyms can help convey the idea of someone who is dedicated to spreading the word about something they believe in.