There are several synonyms for the expression "make haste". When you need to hurry, you can say "hurry up" or "speed up". If you want to express a sense of urgency, you can use "rush" or "hurry". Another useful phrase is "move quickly", which can be used when you want someone to hurry without necessarily implying a sense of urgency. "Get a move on" and "hustle" are more informal alternatives to "make haste". Depending on the context, you can also use "be quick", "act fast", or "make a quick dash", all of which can convey a sense of urgency. Whatever the situation, there are plenty of words and phrases you can use to encourage someone to hurry up.