instantly in WordNet English dictionary

1. without delay or hesitation; with no time intervening
   "he answered immediately"; "found an answer straightaway"; "an official accused of dishonesty should be suspended forthwith"; "Come here now!"
   immediately  instantly  straightaway  straight off  directly  now  right away  at once  forthwith  like a shot  immediately  instantly  straightaway  straight off  directly  now  right away  at once  forthwith  like a shot 
   
2. without any delay
   "he was killed outright"
   instantaneously  outright  instantly  in a flash  instantaneously  outright  instantly  in a flash