There are many phrases that can be used as synonyms for the term "plethora of money." Some common choices include "a wealth of funds," "an abundance of finances," or "a cornucopia of cash." Other options may include "a surplus of wealth," "a heap of riches," or "a mountain of funds." Ultimately, the best synonym will depend on the specific context and tone of the sentence. However, with so many rich options available, it's easy to find a synonym that perfectly captures the idea of a large amount of money.