There are a variety of ways to describe an increase of speed. Some synonyms for this phrase include acceleration, quickening, stepping up, ramping up, intensifying speed, escalating velocity, and hastening momentum. Each of these words highlights a slightly different aspect of speed, from the rate at which it increases to the force behind it. Whether you're talking about a race car on the track, a computer program that needs to run faster, or a person trying to get more done in less time, there are plenty of ways to describe the experience of speeding up. By using these synonyms and other related terms, you can add more nuance and depth to your descriptions of speed and velocity.