Synonyms of terribly

1 Syllable
much
2 Syllables
highly, greatly, badly
3 Syllables
fearfully, markedly, mightily, curiously, gravely, seriously, frightfully, malignly, awfully, thoroughly, fiercely, horribly, dreadfully
4 Syllables
tragically, exceedingly, remarkably, intensely, unhappily, unusually, notoriously, staggeringly, frighteningly, tigerishly, extremely, drastically, decidedly, disturbingly, appallingly
5 Syllables
astonishingly, unbelievably, discouragingly, maleficiently, indispensably, terrifically, desperately
6 Syllables
exaggeratedly, unfortunately, prohibitively