Joseph Black was a renowned Scottish chemist from the 18th century, who is credited with discovering the element carbon dioxide. While there are no direct synonyms to his name, one could consider using other words related to his contributions and field of expertise. For instance, carbon dioxide is often referred to as "CO2," which people might associate with Black's work. Additionally, the terms "chemist" and "chemistry" could be used to describe his profession and area of study, respectively. Other related words might include "discoverer," "scientist," and "innovator," which all speak to Black's important contributions to the world of science.