Synonyms for In haste:

• adv.

  •fast (adverb)
  • hastily,
  • fleetly,
  • hurriedly,
  • apace,
  • promptly,
  • flat-out,
  • presto,
  • swiftly,
  • soon,
  • Posthaste,
  • like greased lightning,
  • soonest,
  • like a shot,
  • in nothing flat,
  • full tilt,
  • swift,
  • pronto,
  • in short order,
  • like a flash,
  • chop-chop,
  • in a flash,
  • expeditiously,
  • like wildfire,
  • post-haste,
  • quickly,
  • quick.
  •on the double (adverb)
  • chop chop,
  • hurried.
  •quickly (adverb)
  • briskly.

• Other synonyms:

  •
  • idly,
  • airily.
  •
  • Willy nilly,
  • anyhow.
  •Other relevant words:
  • headfirst,
  • holus-bolus,
  • incautiously,
  • instantly,
  • like mad,
  • with a rush,
  • hotheadedly,
  • desperately,
  • headlong,
  • impetuously,
  • overhastily,
  • untimely,
  • in passing,
  • rashly,
  • Oversoon,
  • feverishly,
  • precipitously,
  • helter-skelter,
  • post,
  • cursorily,
  • right away,
  • amain,
  • smack,
  • by forced marches,
  • unthinkingly,
  • overenthusiastically,
  • superficially,
  • pop,
  • too early,
  • directly,
  • thoughtlessly,
  • slap,
  • surprisingly,
  • abruptly,
  • impulsively,
  • happen what may,
  • in high,
  • overeagerly,
  • instantaneously,
  • recklessly,
  • dash,
  • unexpectedly,
  • p.d.q.,
  • wantonly,
  • plump,
  • furiously,
  • too soon,
  • bang,
  • sharp,
  • flat out,
  • heedlessly,
  • Slam-bang,
  • wildly,
  • pell-mell,
  • startlingly,
  • straight away,
  • in a wink,
  • on short notice,
  • at flank speed,
  • Headforemost,
  • suddenly,
  • slapdash,
  • head over heels,
  • madly,
  • slap-bang,
  • without warning,
  • in seven-league boots,
  • Precipitantly,
  • plunk,
  • Unpremeditatedly,
  • overzealously,
  • on the run,
  • without notice,
  • carelessly,
  • heels over head,
  • double-quick,
  • prematurely,
  • hell-bent,
  • immediately,
  • at once,
  • unawares,
  • nimbly,
  • plop,
  • Lickety Cut,
  • trippingly,
  • hurry-scurry,
  • without delay,
  • like crazy,
  • hotfoot,
  • agilely,
  • of a sudden,
  • sudden.

Antonyms for In haste:

• adv.

  • fast
    loosely, slow, unfixedly, slowly.
  • quickly
    later, eventually.
  • rapidly
    sluggishly, leisurely.
  • Other antonyms:
    unhurriedly.