1) Actively 2) Aggressively 3) Briskly 4) Doggedly 5) Dynamically 6) Emphatically 7) Energetically 8) Enthusiastically 9) In a robust manner 10) In a vigorous manner 11) Keenly 12) Persistently 13) Smartly 14) Tirelessly 15) With gusto 16) With vigor 1) Actively 2) Amain 3) Busily 4) Fervently 5) Forcefully 6) Quickly 7) Strongly 8) Untiringly 9) Vehemently 
[adv] - with vigor
adverb with vigor; in a vigorous manner; `he defended his ideas vigorously`