Polymathy is a fascinating concept, referring to the state of having extensive knowledge in a broad range of subjects. However, it's always useful to have synonyms for a word, especially when you're trying to add some variety or need to avoid repetition in your writing. Some of the synonyms for Polymathy include Omniscience, Encyclopedic knowledge, Eclectic learning, Full scholarship, Universal erudition, General education, and Wide-ranging intelligence. These synonyms can help you to express the idea of a person who possesses a diverse range of knowledge across multiple disciplines in different ways. Using these synonyms, you can add depth and nuance to your writing and impress your readers with your vocabulary.