Synonyms to flabbergasting

perplexing, Byzantine, arcane, baffling, bewildering, bothering, complex, complicated, confounding, confusing, convoluted, cryptic, discomposing, disconcerting, dismaying, distracting, disturbing, embarrassing, enigmatic, impenetrable, incomprehensible, intricate, involved, knotty, labyrinthine, mysterious, mystifying, paradoxical, perturbing, problematic, puzzling, recondite, riddling, sphinxlike, stupefying, twisted, unfathomable, upsetting, prodigious, Atlantean, Brobdingnagian, Cyclopean, Gargantuan, Herculean, Homeric, abysmal, amazing, amplitudinous, astonishing, astounding, astronomic, astronomical, awesome, beguiling, bewitched, boundless, bulky, colossal, cosmic, cracking, cyclopean, dumbfounding, elephantine, enchanted, enormous, epic, exceptional, extensive, extraordinary, fabulous, fantastic, fascinating, galactic, gargantuan, giant, giantlike, gigantic, heroic, huge, humongous, immeasurable, immense, inconceivable, incredible, indescribable, ineffable, infinite, jumbo, king-size, large, legendary, leviathan, magical, ma