The phrase "could do with something" is often used to express a desire or a need for something. There are several synonyms for this phrase, including "require," "need," "want," "crave," "desire," and "long for." Each of these words has its nuances and connotations, but they all convey a sense of lacking something necessary or desirable. For instance, "require" suggests that something is necessary for survival or success, while "long for" implies a strong emotional desire for something. Understanding the subtle differences between these synonyms can help you communicate your ideas more precisely and effectively.