Synonyms of horribly

1 Syllable
much
2 Syllables
highly, greatly, badly
3 Syllables
fearfully, markedly, mightily, gravely, seriously, frightfully, fiendishly, awfully, malignly, thoroughly, fiercely, terribly, dreadfully
4 Syllables
tragically, exceedingly, remarkably, intensely, disastrously, lamentably, unhappily, notoriously, staggeringly, frighteningly, infernally, tigerishly, extremely, drastically, decidedly, disturbingly, appallingly
5 Syllables
unbelievably, discouragingly, maleficiently, desperately, diabolically
6 Syllables
unfortunately