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.
  •quickly (adverb)
  • briskly,
  • immediately,
  • instantly,
  • instantaneously.
  •rapidly (adverb)
  • flat out.

• Other synonyms:

  •
  • idly,
  • airily.
  •
  • Willy nilly,
  • anyhow.

Antonyms for In haste:

• adv.

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