A burst of speed or activity.
In Agile software development, a period of development of a fixed time that is preceded and followed by meetings.
A short race at top speed.
To run, cycle, etc. at top speed for a short period.
A large and generally unstoppable surge.
A very large and destructive wave, generally caused by a tremendous disturbance in the ocean, such as an undersea earthquake or volcanic eruption. Tsunami are usually a series of waves, or wave train.