Difference between Rapid and Fast

What is the difference between Rapid and Fast?

Rapid as an adjective is describes a process or concept which occurs quickly. while Fast as an adjective is firmly or securely fixed in place; stable.

Rapid

Part of speech: adjective

Definition: Describes a process or concept which occurs quickly.

Part of speech: noun

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

Example sentence: Semantics, or the study of meaning, remained undeveloped, while phonetics made rapid progress and even came to occupy the central place in the scientific study of language.

Fast

Part of speech: verb

Definition: To abstain from or eat very little food; to abstain from food for religious reasons.

Part of speech: noun

Definition: The act or practice of abstaining from food or of eating very little food.The period of time during which one abstains from or eats very little food.A train that calls at only some stations it passes between its origin and destination, typically just the principal stations.

Part of speech: adverb

Definition: In a firm or secure manner, securely; in such a way as not to be moved.Deeply or soundly.Immediately following in place or time; close, very near.Quickly, with great speed; within a short time.Ahead of the correct time or schedule.

Part of speech: adjective

Definition: Firmly or securely fixed in place; stable.Of people: steadfast, with unwavering feeling. (Now only in set phrases like "fast friend".)Moving with great speed, or capable of doing so; swift, rapid.Deep or sound (of sleep); fast asleep (of people).Of dyes or colours: not running or fading when subjected to detrimental conditions such as wetness or intense light; permanent.Having an extravagent lifestyle or immoral habits.Ahead of the correct time or schedule.More sensitive to light than average.

Part of speech: interjection

Definition: Short for "stand fast", a warning not to pass between the arrow and the target.

Example sentence: Life moves so fast. You gotta document the good times, man.

We hope you now know whether to use Rapid or Fast in your sentence.

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