1) Cogently 2) Compellingly 3) Convincingly 4) In a vehement manner 5) Powerfully 6) Vigorously 1) Excitedly 2) Fervently 3) Hotly 4) Passionately 
• (adv.) In a vehement manner.
Ve'he·ment·ly adverb In a vehement manner. 
[adv] - in a vehement manner
vehemently 1. Characterized by arising from or marked by impetuosity of feeling or passion; ardent. 2. A descriptive reference to acting with great force or energy; energetic; violent; furious. 3. Etymology: some sources state that the 'ultimate origin is uncertain'; however, The Barnhart Dictionary of Etymology, 'probably before 1425, from Middl...
adverb in a vehement manner; `he vehemently denied the accusations against him`
in a fierce manner[Difficult words] in a fierce manner