tremendous in WordNet English dictionary

1. extreme in degree or extent or amount or impact
   "in a frightful hurry"; "spent a frightful amount of money"
   frightful  terrible  awful  tremendous 
   
2. extraordinarily large in size or extent or amount or power or degree
   "an enormous boulder"; "enormous expenses"; "tremendous sweeping plains"; "a tremendous fact in human experience; that a whole civilization should be dependent on technology"- Walter Lippman; "a plane took off with a tremendous noise"
   enormous  tremendous 
   
3. extraordinarily good or great ; used especially as intensifiers
   "a fantastic trip to the Orient"; "the film was fantastic!"; "a howling success"; "a marvelous collection of rare books"; "had a rattling conversation about politics"; "a tremendous achievement"
   fantastic  grand  howling  marvelous  marvellous  rattling  terrific  tremendous  wonderful  wondrous