Synonyms for In nothing flat:

• adj.

  •fast (adjective)
  • like crazy,
  • quick,
  • screamin',
  • double-time,
  • on the double,
  • PDQ,
  • BLUE STREAK,
  • agile,
  • ready,
  • like all get out,
  • like mad,
  • in a jiffy,
  • hypersonic,
  • dashing,
  • brisk,
  • racing,
  • hot,
  • presto,
  • supersonic,
  • flying,
  • hairtrigger,
  • winged,
  • flashing,
  • accelerated,
  • breakneck,
  • active,
  • Expeditive,
  • hasty,
  • speedball,
  • velocious,
  • hurried,
  • swift,
  • post-haste,
  • snappy,
  • in nothing flat,
  • snapper,
  • like a bat out of hell,
  • nimble,
  • chop-chop,
  • expeditious,
  • electric,
  • fleeting.
  •fleet (adjective)
  • lively,
  • speedy,
  • meteoric.
  •hell-for-leather (adjective)
  • bunny,
  • lick.
  •rapid (adjective)
  • express,
  • double time,
  • spry,
  • precipitate,
  • quickened,
  • prompt.
  •swift (adjective)
  • headlong,
  • cracking,
  • short-lived,
  • short,
  • abrupt,
  • unexpected,
  • sudden,
  • spanking.

• adv.

  •fast (adverb)
  • in short order,
  • like a shot,
  • in haste,
  • full tilt,
  • flat-out,
  • like a flash,
  • like wildfire,
  • in a flash,
  • soon,
  • rapidly,
  • expeditiously,
  • hastily,
  • fleetly,
  • soonest,
  • swiftly,
  • hurriedly,
  • like greased lightning.
  •hell-for-leather (adverb)
  • like blue streak,
  • like streak.
  •immediately (adverb)
  • forthwith,
  • shortly,
  • ANON,
  • in a new york minute,
  • summarily,
  • straight off,
  • thereupon,
  • directly,
  • away,
  • instantly,
  • instantaneously.
  •now (adverb)
  • nowadays,
  • at this time,
  • momentarily,
  • at the moment,
  • this day,
  • at this moment,
  • any more,
  • just now,
  • straightaway,
  • right away,
  • at once,
  • here and now,
  • first off,
  • today,
  • these days,
  • in a moment,
  • in a minute.
  •promptly (adverb)
  • on time,
  • sharp.
  •quickly (adverb)
  • briskly.

• Other synonyms:

  •
  • apace,
  • pronto,
  • Lickety Split.
  •
  • quickly,
  • Posthaste.
  •Other relevant words:
  • flat out,
  • hell-for-leather,
  • in no time.

Antonyms for In nothing flat:

• adj.

  • fast
    slow, tardy, plodding, unhurried.
  • fleet
    clumsy.
  • rapid
    leisurely, Languishing, slack.
  • swift
    delayed, sluggish.

• adv.

  • fast
    slowly.
  • immediately
    eventually, never, later.
  • now
    future, past.
  • promptly
    late, negligently.