Synonyms of diligently

2 Syllables
briskly, nimbly
3 Syllables
studiously, earnestly, arduously, busily, eagerly, speedily, seriously, hurriedly, strenuously, zealously, ardently, fervently, restlessly, hastily
4 Syllables
carefully, industriously, persistently, unweariedly, spiritedly, vigorously, untiringly, agilely, vigilantly, assiduously, laboriously, painstakingly, vivaciously
5 Syllables
animatedly, perseveringly, purposefully, unremittingly, expeditiously
6 Syllables
indefatigably, energetically, enthusiastically