What is another word for speed up?
Pronunciation: [spˈiːd ˈʌp] (IPA) 
Speed up is a common phrase used to indicate an increase in speed or acceleration. However, there are several synonyms that can be used to convey the same meaning. Some of these synonyms include accelerate, hasten, quicken, expedite, and rush. Each of these words indicates an increase in speed, and can be used in various contexts. For instance, accelerate is often used in a technical context, whereas hasten is commonly used to describe an action being taken to increase speed. Quicken and expedite are often used to express a sense of urgency, while rush is used to indicate a sudden or abrupt increase in speed. Regardless of the word chosen, each synonym can effectively communicate the idea of speeding up.
