Excessive expenditure is a financial situation that occurs when one spends more money than they can afford. In such cases, it is important to know different synonyms that can help in communicating the same message but with different words. Overspending is a common synonym for excessive expenditure, as it implies spending more than what is necessary or reasonable. The phrase lavish spending is also used to describe excessive expenses that are disproportionately high. Another synonym is extravagant spending, which means spending money on things that are luxurious and not needed. Lastly, the phrase heavy expenditure is used to describe a situation where one spends more than they can afford, resulting in financial difficulties.