When talking about extra money, there are various synonyms that one can use to express the same idea. Some of these synonyms include additional income, supplementary funds, surplus money, spare cash, bonus earnings, surplus income, and supplemental income. Often, people look for ways to earn extra money to support their lifestyles, fulfill their needs or invest in future projects. The good news is that there are numerous opportunities to earn extra money by engaging in part-time jobs, freelancing gigs, passive income sources, or starting a side business. All in all, having extra money can provide peace of mind and more financial security, allowing individuals to live their life to the fullest.