RAPID
WordNet

adjective


(1)   Done or occurring in a brief period of time
"A rapid rise through the ranks"
(2)   Characterized by speed; moving with or capable of moving with high speed
"A rapid movement"
"A speedy car"
"A speedy errand boy"

noun


(3)   A part of a river where the current is very fast
WiktionaryText

Adjective



  1. Describes a process or concept which occurs quickly.

Noun



  1. a rough section of a river or stream which is difficult to navigate due to the swift and turbulent motion of the water.
 
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