Rapidity
Rapidity noun - A high rate of movement or performance.
Usage example: the rapidity with which she can do mental math calculations is amazing
Speed is a synonym for rapidity in quickness topic. In some cases you can use "Speed" instead a noun "Rapidity", when it comes to topics like swiftness, fast. popular alternative
Speed
Speed noun - A high rate of movement or performance.
Usage example: we dashed off the remaining paperwork with as much speed as possible so we could leave for the long weekend
Rapidity is a synonym for speed in swiftness topic. You can use "Rapidity" instead a noun "Speed", if it concerns topics such as fast, quickness, velocity, rate of motion. popular alternative
Mutual synonyms
Cite this Source
Speed and Rapidity. (2016). Retrieved 2026, August 15, from https://thesaurus.plus/related/rapidity/speed
Rapidity & Speed. N.p., 2016. Web. 15 Aug. 2026. <https://thesaurus.plus/related/rapidity/speed>.
Speed or Rapidity. 2016. Accessed August 15, 2026. https://thesaurus.plus/related/rapidity/speed.
Google Ngram Viewer shows how "rapidity" and "speed" have occurred on timeline