Synonyms for Straight away:

• adj.

  •Other relevant words: (adjective)
  • time.

• adv

  •Other relevant words: (adverb)
  • Instanter,
  • at once,
  • unhesitatingly,
  • on the dot,
  • now or never,
  • no sweat,
  • at drop of hat,
  • in no time,
  • Straightly,
  • without difficulty,
  • quick as a wink,
  • double-time,
  • this minute,
  • instantly,
  • hereupon,
  • undeviatingly,
  • without hesitation,
  • like now,
  • in a jiffy,
  • at the drop of a hat,
  • at short notice,
  • facilely,
  • on the spot,
  • immediately,
  • right now,
  • slick as whistle,
  • without demur,
  • there and then.

• adv.

  •immediately (adverb)
  • instantaneously,
  • soon,
  • forthwith,
  • straight off,
  • promptly,
  • thereupon,
  • in a flash,
  • in a new york minute,
  • away,
  • ANON,
  • on the double,
  • shortly,
  • pronto,
  • rapidly.
  •instantly (adverb)
  • first off,
  • right away.
  •Other relevant words: (adverb)
  • soonest,
  • nothing to it,
  • lightly,
  • this instant,
  • spontaneously,
  • in nothing flat,
  • readily,
  • tout de suite,
  • gladly,
  • on a dime,
  • soon afterward,
  • without delay,
  • swimmingly,
  • urgently.
  •punctually (adverb)
  • sharply,
  • speedily,
  • expeditiously,
  • punctually,
  • swiftly,
  • precisely,
  • quickly.
  •readily (adverb)
  • easily,
  • smoothly,
  • piece of cake,
  • willingly,
  • hands down,
  • freely,
  • eagerly,
  • well,
  • cheerfully.
  •right (adverb)
  • direct,
  • due.

• n.

  •
  • headlong,
  • straight,
  • fast.

• Other synonyms:

  •
  • already,
  • straightaway,
  • impulsive,
  • summarily,
  • summary,
  • bang,
  • poof,
  • lightning,
  • abrupt,
  • fast-paced,
  • prompt,
  • directly,
  • Posthaste,
  • on-the-spot,
  • wham-bam,
  • instant,
  • precipitous,
  • now,
  • short,
  • impetuous,
  • fast track,
  • suddenly,
  • PDQ,
  • instantaneous,
  • swift.
  •
  • flat,
  • quick,
  • presto,
  • slap,
  • violently,
  • immediate,
  • flash,
  • rude,
  • cold.
  •
  • right.
  •Other relevant words (noun):
  • Lickety Split,
  • momentarily,
  • in haste,
  • in short order,
  • once,
  • straightway,
  • apace,
  • in two shakes,
  • in a trice,
  • hurriedly,
  • in a moment,
  • hastily,
  • on the nail,
  • outright,
  • like a shot,
  • in a wink,
  • post-haste,
  • like greased lightning,
  • like lightning,
  • p.d.q.,
  • nail,
  • right off,
  • double-quick,
  • precipitately.

Antonyms for Straight away:

• adv.

  • immediately
    later, never, eventually.
  • readily
    unwillingly, Difficultly, grudgingly.
  • right
    incorrectly, inappropriately, unfairly, unjustly, indirectly, unsuitably, inaccurately, wrongly.