区别就是hurry up是动词hurry+介词 up短语，具体的不同如下

hurry up中文意思是（使）赶快

Franklin told Howe to hurry up and take his bath; otherwise, they'd miss their train.

hurry中文意思是v. 匆忙，急忙；催促，n. 急忙；紧急，赶紧的理由

Why are you in such a hurry?。