With money to burn is an idiom that refers to someone who has a lot of money to spend recklessly. Synonyms for this phrase include "rolling in dough," "flush with cash," "loaded," "wealthy," "affluent," "prosperous," and "well-to-do." These words convey the idea that the person has a surplus of money that they can afford to spend extravagantly. Other related phrases to describe a wealthy person include "on easy street," "living the high life," "enjoying the good life," "financially secure," and "in the lap of luxury." These synonyms are often used to describe individuals with a high net worth, such as business executives, celebrities, and investors.