Kurnakovite is a very specific term that refers to a rare mineral with a unique crystal structure. As such, there are limited synonyms for this word. However, some possible alternatives could include "potassium carbonate" or "potash." These terms may not be precise synonyms for kurnakovite, but they are related in that they also involve the mineral potassium. Additionally, other minerals that may share similar characteristics with kurnakovite include zabuyelite, allanite, and pyrrhotite. While these terms may not be direct synonyms, they offer some insight into the broader field of mineralogy.