Synonyms for Tremendous:

adj.

huge, overwhelming (adjective)
incredible, enormous, super, excellent, wonderful, fabulous, great, humongous, whopping, awesome, prodigious, jumbo, large, mammoth, marvelous, colossal, towering, appalling, gigantic, vast, monumental, terrific, immense, titanic, exceptional, extraordinary, stupendous, monstrous, fantastic, gargantuan, massive.
large (adjective)
grand, voluminous, bulky, ample, spacious, lofty, generous, comprehensive, vast, immense, prodigious, huge, elephantine, grandiose, extensive, roomy, impressive, giant, magnificent, capacious, towering, massive, baggy, enormous, mammoth, great, gargantuan, soaring, copious, sizable, gigantic, humongous, expansive, big, large, awesome, colossal, majestic, cavernous, princely.

n.

high, considerable, substantial, widely, study at enormous. excellent, cyclopean, Gigantesque, Brobdingnagian, mountainous, incredible, titanic, Bunyanesque, stupendous, monumental, monster, mighty, whopping, walloping, exceptional, Massy, mastodonic, heroic, jumbo, monstrous, fine, herculean, decent, behemoth, Pythonic, wonder. groovy, neat, fantastical, glorious, dandy, keen, cool, splendid, dreamy, good, superb, nifty, ripping, sensational, fabulous, swell, hot, divine, super. fear, appalling, ghastly, redoubtable, scary.

Other synonyms:

walloping, superb, scary, nifty, Bunyanesque, Brobdingnagian, mastodonic, cyclopean, groovy, Gigantesque, Pythonic, Massy, ripping. mountainous, monumental, redoubtable, titanic, excellent, whopping. decent, exceptional, monstrous, herculean, ghastly, appalling, stupendous. fabulous, dreamy, incredible, sensational, dandy, wonder. glorious. divine, hot, neat, monster, keen, cool, splendid. fine. good. imposing
mighty.
tall
high.
Other relevant words:
keen, incredible, dreamy, behemoth, marvelous, excellent, swell, splendid, mighty, scary, mastodonic, super, heroic, monumental, terrific, titanic, ripping, monstrous, Bunyanesque, considerable, divine, Brobdingnagian, redoubtable, stupendous, mountainous, fine, jumbo, ghastly, fabulous, substantial, glorious, Gigantesque, whopping, walloping, wonder, neat, monster, superb, groovy, fantastic, herculean, good, fantastical, Pythonic, wondrous, nifty, marvellous, extraordinary, sensational, high, howling, appalling, Massy, dandy, rattling, widely, cyclopean, exceptional, cool, hot, decent, fear.

Usage examples for tremendous

  1. It is a tremendous help to both of us, if I may say so again. – A Prisoner in Fairyland by Algernon Blackwood
  2. As I said before, it was a tremendous old place. – Love, The Fiddler by Lloyd Osbourne