Nothing. They mean the exact same thing, although haste is a more formal form of hurry.

Get up and Stand up? I would use "get up" to tell someone to raise himself from a sitting or sleeping position for a reason .Maybe he is sitting on your clothes ,and you want to take it away or you want him to tell him not to sleep further . Stand up is more exact : you want him to stand for you . There are very similar , but can be different in some context. Polis will say get up or stand up if there want to search you , but you cant say " stand up " if you just want to wake up someone. Hurry and haste? Hurry is a verb .Haste is a noun Hurry > to do something with speed / haste is hurried action or urgency in doing somthing . In a hurry = in haste = in a hurried manner