Accelerate vs Fast - What's the difference?

accelerate | fast |

As verbs the difference between accelerate and fast

is that accelerate is (label) to cause to move faster; to quicken the motion of; to add to the speed of while fast is .

As an adjective accelerate

is (rare) accelerated; quickened; hastened; hurried.

Other Comparisons: What's the difference?




  • (label) To cause to move faster; to quicken the motion of; to add to the speed of.
  • (label) To quicken the natural or ordinary progression or process of.
  • *{{quote-magazine, year=2013, month=September-October, author= Michael Sivak
  • , magazine=(American Scientist), title= Will AC Put a Chill on the Global Energy Supply? , passage=Nevertheless, it is clear that the global energy demand for air-conditioning will grow substantially as nations become more affluent, with the consequences of climate change potentially accelerating the demand.}}
  • To cause a change of velocity.
  • (label) To hasten, as the occurrence of an event.
  • To enable a student to finish a course of study in less than normal time.
  • (label) To become faster; to begin to move more quickly.
  • (label) Grow; increase.
  • (label)
  • Synonyms

    * advance * dispatch * expedite * forward * further * hasten * quicken * speed up


    * decelerate * retard

    Derived terms

    * accelerative * accelerator * accelerated motion * accelerating force


  • (rare) Accelerated; quickened; hastened; hurried.
  • * 1662 Thomas Salusbury, Galileo's Dialogue Concerning the Two Chief World Systems , Dialogue 2:
  • ... a general knowledg of the definition of motion, and of the distinction of natural and violent, even and accelerate , and the like, sufficing.


    * English ergative verbs ----



    (wikipedia fast)

    Etymology 1

    From (etyl) fast, from (etyl) ; see it for cognates and further etymology. The development of “rapid” from an original sense of “secure” apparently happened first in the adverb and then transferred to the adjective; compare (hard) in expressions like “to run hard”. The original sense of “secure, firm” is now slightly archaic, but retained in the related .


  • (dated) Firmly or securely fixed in place; stable.
  • That rope is dangerously loose. Make it fast !
  • Firm against attack; fortified by nature or art; impregnable; strong.
  • * Spenser
  • outlaws lurking in woods and fast places
  • (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.
  • I am going to buy a fast car.
  • (computing, of a piece of hardware) Able to transfer data in a short period of time.
  • Deep or sound (of sleep); fast asleep (of people).
  • * Shakespeare
  • all this while in a most fast sleep
  • (of dyes or colours) Not running or fading when subjected to detrimental conditions such as wetness or intense light; permanent.
  • All the washing has come out pink. That red tee-shirt was not fast .
  • (obsolete) Tenacious; retentive.
  • * Francis Bacon
  • Roses, damask and red, are fast flowers of their smells.
  • (colloquial) Having an extravagant lifestyle or immoral habits.
  • She's fast – she slept with him on their first date. .
  • Ahead of the correct time or schedule.
  • There must be something wrong with the hall clock. It is always fast .
  • (of photographic film) More sensitive to light than average.
  • Synonyms
    * (occurring or happening within a short time) quick, rapid, speedy, swift * (capable of moving with great speed) quick, rapid, speedy * (ahead of the correct time or schedule) ahead * (rapidly consents to sexual activity) easy, slutty * (firmly or securely fixed in place) firm, immobile, secure, stable, stuck, tight * (firm against attack) fortified, impenetrable * colour-fast * deep, sound
    * (occurring or happening within a short time) slow * (ahead of the correct time or schedule) slow, behind * (firmly or securely fixed in place) loose * (firm against attack) penetrable, weak * light
    Derived terms
    * bedfast * chairfast * fasten (rapid) * fast and furious * fast food * fast-forward


  • In a firm or secure manner, securely; in such a way as not to be moved .
  • (of sleeping) Deeply or soundly .
  • Immediately following in place or time; close, very near .
  • Quickly, with great speed; within a short time .
  • * {{quote-magazine, date=2013-08-17, volume=408, issue=8849, magazine=(The Economist)
  • , title= Pennies streaming from heaven , passage=Faster than a speeding bit, the internet upended media and entertainment companies. Piracy soared, and sales of albums and films slid. Newspapers lost advertising and readers to websites. Stores selling books, CDs and DVDs went bust. Doomsayers predicted that consumers and advertisers would abandon pay-television en masse in favour of online alternatives.}}
  • Ahead of the correct time or schedule.
  • Synonyms
    * (quickly) quickly, rapidly, speedily, swiftly * (in a firm or secure manner) firmly, securely, tightly * deeply * (ahead of the correct time or schedule) ahead
    * (quickly) slowly * (in a firm or secure manner) loosely * lightly * (ahead of the correct time or schedule) behind


    (en noun)
  • (British, rail transport) A train that calls at only some stations it passes between its origin and destination, typically just the principal stations
  • Synonyms
    * (rail transport) express, express train, fast train
    * (rail transport) local, slow train, stopper


    (en interjection)
  • (archery) Short for "stand fast", a warning not to pass between the arrow and the target
  • Antonyms
    * (archery) loose

    Etymology 2

    From (etyl) fasten, from (etyl) . The noun is probably from (etyl) fasta.


    (en verb)
  • To abstain from food, or eat very little, especially for religious or medical reasons.
  • Muslims fast during Ramadan.
  • * Bible, 2 Sam. xii. 21
  • Thou didst fast and weep for the child.
  • * Milton
  • Fasting' he went to sleep, and ' fasting waked.
  • * 2007 , John Zerzan, Silence , p. 3,
  • It is at the core of the Vision Quest, the solitary period of fasting and closeness to the earth to discover one's life path and purpose.


    (en noun)
  • 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
  • * Lent and Ramadan are fasts of two religions.
  • Synonyms
    * (act or practice) fasting
    Derived terms
    * break one's fast * breakfast * fast day