Synonyms for mightily

awfully, decidedly, enormously, especially, exceedingly, extra, extraordinarily, extremely, fiercely, greatly, heavily, highly, hugely, immensely, intensely, majorly, markedly, notably, overpoweringly, overwhelmingly, particularly, powerfully, profoundly, remarkably, resoundingly, robustly, seriously, severely, significantly, strongly, substantially, terribly, tremendously, vastly