Charles William Post was a renowned American businessman who achieved great success through his contributions to the cereal industry. A few synonyms that can be used to refer to Post include entrepreneur, industrialist, tycoon, pioneer, innovator, and visionary. Post was widely known for his leadership skills and his ability to turn ideas into profitable businesses, which earned him the reputation of a true startup genius. He introduced various innovations and advancements in the production of cereals, which revolutionized the industry and changed the way people thought about breakfast. His legacy lives on through many modern products that can be traced back to his original ideas and methods, making him a true industry pioneer.