There are numerous synonyms for the word "spend" which can be used depending on the context of the sentence. Some common synonyms include "invest," which implies that the spending is being done on something valuable or with an expectation of future returns. "Expend" is another synonym, and it is typically used when the spending is being done in an effort to accomplish a task or achieve a goal. "Splurge" is a more informal synonym which has a more positive connotation than "spend" and is often used to describe treating oneself or indulging in something. Other alternatives include "consume," "disburse," "use up," and "squander," which imply varying levels of control and intentionality over the spending.