[1] : The Collaborative International Dictionary of English v.0.48

earth-shaking \earth-shaking\ adj.
   sufficiently significant to affect the whole world; as,
   earth-shaking proposals; an earth-shaking event.

   syn: world-shaking, world-shatteringpredicate, world
        shatteringpredicate.
        wordnet 1.5

[2] : WordNet (r) 2.0

earthshaking
     adj 1: loud enough to shake the very earth
     2: sufficiently significant to affect the whole world;
        "earthshaking proposals"; "the contest was no
        world-shaking affair"; "the conversation...could hardly be
        called world-shattering" syn: world-shaking, world-shattering
see also:
world-shaking world-shattering 

[3] : Moby Thesaurus II by Grady Ward, 1.0

47 moby thesaurus words for "earthshaking":
   big, big-league, big-name, big-time, bigwig, bigwigged, booming,
   consequential, considerable, deafening, double-barreled,
   ear-piercing, ear-rending, ear-splitting, forte, fortissimo, full,
   grand, great, heavyweight, high-powered, important, loud,
   loud-sounding, loudish, major, material, momentous, name, pealing,
   piercing, plangent, resounding, ringing, self-important,
   significant, sonorous, stentoraphonic, stentorian, stentorious,
   substantial, superior, thunderous, tonitruant, tonitruous,
   window-rattling, world-shaking

Earthshaking >> E Words
Earthshaking, definition of term: Earthshaking
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