The phrase "be in need of" is a common expression used to indicate a need or requirement for something. However, there are several synonymous phrases that can be used to convey the same meaning. Alternative expressions include phrases such as "require," "demand," "desire," or "crave." Other options are "lack," "miss," "want," "needful," and "yearn for." These synonyms can be used interchangeably to help you convey the message more precisely and with greater impact, depending on the context. By having a varied vocabulary base, it is easier to deliver your message with more nuance and depth.