Synonyms for significantly

considerably, convincingly, crucially, deeply, dramatically, drastically, enormously, exceedingly, exceptionally, extraordinarily, greatly, highly, hugely, importantly, impressively, majorly, markedly, mightily, notably, noticeably, outstandingly, overwhelmingly, profoundly, prominently, pronouncedly, quite, remarkably, seriously, severely, significantly, strikingly, substantially, tellingly, vastly, very, vitally