VS.

Rapid vs. Fast

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  • Rapid (adjective)

    Very swift or quick.

    "a rapid stream;"

    "rapid growth;"

    "rapid improvement"

  • Rapid (adjective)

    Steep, changing altitude quickly. (of a slope)

  • Rapid (adjective)

    Needing only a brief exposure time. (of a lens, plate, film, etc.)

  • Rapid (adjective)

    Violent, severe.

  • Rapid (adjective)

    Happy.

  • Rapid (adverb)

    Rapidly.

  • Rapid (noun)

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

  • Rapid (noun)

    A burst of rapid fire.

  • Fast (adjective)

    Firmly or securely fixed in place; stable. from 9th c.

    "That rope is dangerously loose. Make it fast!"

  • Fast (adjective)

    Firm against attack; fortified by nature or art; impregnable; strong.

  • Fast (adjective)

    Steadfast, with unwavering feeling. (Now mostly in set phrases like fast friend(s).) from 10th c.

  • Fast (adjective)

    Moving with great speed, or capable of doing so; swift, rapid. from 14th c.

    "I am going to buy a fast car."

  • Fast (adjective)

    Causing unusual rapidity of play or action.

    "a fast racket, or tennis court; a fast track; a fast billiard table; a fast dance floor"

  • Fast (adjective)

    Able to transfer data in a short period of time.

  • Fast (adjective)

    Deep or sound (of sleep); fast asleep (of people). 16th-19th c.

  • Fast (adjective)

    Not fading when subjected to detrimental conditions such as wetness or intense light; permanent. from 17th c.

    "All the washing has come out pink. That red tee-shirt was not fast."

  • Fast (adjective)

    Tenacious; retentive.

  • Fast (adjective)

    Having an extravagant lifestyle or immoral habits. from 18th c.

    "a fast woman"

  • Fast (adjective)

    Ahead of the correct time or schedule. from 19th c.

    "There must be something wrong with the hall clock. It is always fast."

  • Fast (adjective)

    More sensitive to light than average. from 20th c.

  • Fast (adverb)

    In a firm or secure manner, securely; in such a way as not to be moved; safe, sound from 10th c..

    "Hold this rope as fast as you can."

  • Fast (adverb)

    Deeply or soundly from 13th c..

    "He is fast asleep."

  • Fast (adverb)

    Immediately following in place or time; close, very near from 13th c..

    "The horsemen came fast on our heels."

  • Fast (adverb)

    Quickly, with great speed; within a short time from 13th c..

    "Do it as fast as you can."

  • Fast (adverb)

    Ahead of the correct time or schedule.

    "I think my watch is running fast."

  • Fast (noun)

    A train that calls at only some stations it passes between its origin and destination, typically just the principal stations

  • Fast (noun)

    The act or practice of abstaining from food or of eating very little food.

  • Fast (noun)

    The period of time during which one abstains from or eats very little food.

    "Lent and Ramadan are fasts of two religions."

  • Fast (interjection)

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

  • Fast (verb)

    To restrict one’s personal consumption, generally of food, but sometimes other things, in various manners (totally, temporally, by avoiding particular items), often for religious or medical reasons.

    "Muslims fast during Ramadan and Catholics during Lent."

Wiktionary
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  • Rapid (adjective)

    Very swift or quick; moving with celerity; fast; as, a rapid stream; a rapid flight; a rapid motion.

  • Rapid (adjective)

    Advancing with haste or speed; speedy in progression; in quick sequence; as, rapid growth; rapid improvement; rapid recurrence; rapid succession.

  • Rapid (adjective)

    Quick in execution; as, a rapid penman.

  • Rapid (noun)

    The part of a river where the current moves with great swiftness, but without actual waterfall or cascade; sometimes called whitewater; - usually used in the plural; as, the Lachine rapids in the St. Lawrence.

  • Fast (verb)

    To abstain from food; to omit to take nourishment in whole or in part; to go hungry.

  • Fast (verb)

    To practice abstinence as a religious exercise or duty; to abstain from food voluntarily for a time, for the mortification of the body or appetites, or as a token of grief, or humiliation and penitence.

  • Fast (noun)

    Abstinence from food; omission to take nourishment.

  • Fast (noun)

    Voluntary abstinence from food, for a space of time, as a spiritual discipline, or as a token of religious humiliation.

  • Fast (noun)

    A time of fasting, whether a day, week, or longer time; a period of abstinence from food or certain kinds of food; as, an annual fast.

  • Fast (noun)

    That which fastens or holds; especially, (Naut.) a mooring rope, hawser, or chain; - called, according to its position, a bow, head, quarter, breast, or stern fast; also, a post on a pier around which hawsers are passed in mooring.

  • Fast (adjective)

    Firmly fixed; closely adhering; made firm; not loose, unstable, or easily moved; immovable; as, to make fast the door.

  • Fast (adjective)

    Firm against attack; fortified by nature or art; impregnable; strong.

  • Fast (adjective)

    Firm in adherence; steadfast; not easily separated or alienated; faithful; as, a fast friend.

  • Fast (adjective)

    Permanent; not liable to fade by exposure to air or by washing; durable; lasting; as, fast colors.

  • Fast (adjective)

    Tenacious; retentive.

  • Fast (adjective)

    Not easily disturbed or broken; deep; sound.

  • Fast (adjective)

    Moving rapidly; quick in mition; rapid; swift; as, a fast horse.

  • Fast (adjective)

    Given to pleasure seeking; disregardful of restraint; reckless; wild; dissipated; dissolute; as, a fast man; a fast liver.

  • Fast (adjective)

    In such a condition, as to resilience, etc., as to make possible unusual rapidity of play or action; as, a fast racket, or tennis court; a fast track; a fast billiard table, etc.

  • Fast (adverb)

    In a fast, fixed, or firmly established manner; fixedly; firmly; immovably.

  • Fast (adverb)

    In a fast or rapid manner; quickly; swiftly; extravagantly; wildly; as, to run fast; to live fast.

Webster Dictionary
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  • Rapid (noun)

    a part of a river where the current is very fast

  • Rapid (adjective)

    done or occurring in a brief period of time;

    "a rapid rise through the ranks"

  • Rapid (adjective)

    characterized by speed; moving with or capable of moving with high speed;

    "a rapid movment"

    "a speedy car"

    "a speedy errand boy"

  • Fast (noun)

    abstaining from food

  • Fast (verb)

    abstain from certain foods, as for religious or medical reasons;

    "Catholics sometimes fast during Lent"

  • Fast (verb)

    abstain from eating;

    "Before the medical exam, you must fast"

  • Fast (adjective)

    acting or moving or capable of acting or moving quickly;

    "fast film"

    "on the fast track in school"

    "set a fast pace"

    "a fast car"

  • Fast (adjective)

    (used of timepieces) indicating a time ahead of or later than the correct time;

    "my watch is fast"

  • Fast (adjective)

    at a rapid tempo;

    "the band played a fast fox trot"

  • Fast (adjective)

    (of surfaces) conducive to rapid speeds;

    "a fast road"

    "grass courts are faster than clay"

  • Fast (adjective)

    firmly fastened or secured against opening;

    "windows and doors were all fast"

    "a locked closet"

    "left the house properly secured"

  • Fast (adjective)

    resistant to destruction or fading;

    "fast colors"

  • Fast (adjective)

    unrestrained by convention or morality;

    "Congreve draws a debauched aristocratic society"

    "deplorably dissipated and degraded"

    "riotous living"

    "fast women"

  • Fast (adjective)

    hurried and brief;

    "paid a flying visit"

    "took a flying glance at the book"

    "a quick inspection"

    "a fast visit"

  • Fast (adjective)

    securely fixed in place;

    "the post was still firm after being hit by the car"

  • Fast (adjective)

    unwavering in devotion to friend or vow or cause;

    "a firm ally"

    "loyal supporters"

    "the true-hearted soldier...of Tippecanoe"

    "fast friends"

  • Fast (adverb)

    quickly or rapidly (often used as a combining form);

    "how fast can he get here?"

    "ran as fast as he could"

    "needs medical help fast"

    "fast-running rivers"

    "fast-breaking news"

    "fast-opening (or fast-closing) shutters"

  • Fast (adverb)

    firmly or tightly;

    "held fast to the rope"

    "her foot was stuck fast"

    "held tight"

Princeton's WordNet
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