Synonyms for Decisively:

adv

beyond any doubt (adverb)
finally.
certainly (adverb)
decidedly.
finally (adverb)
finally, lastly, conclusively, enduringly.
resolutely (adverb)
stubbornly, resolutely, devotedly, valiantly, heartily, diligently, fearlessly, doggedly, relentlessly, loyally, persistently, decidedly, pluckily, tirelessly, truly, determinedly, indefatigably, courageously, boldly, intently, tenaciously, steadily, dauntlessly, staunchly, toughly, deliberately, faithfully, indomitably.
tenaciously (adverb)
devotedly, truly, obstinately, faithfully, resolutely, indefatigably, pluckily, courageously, tenaciously, tirelessly, heartily, staunchly, persistently, doggedly, unflaggingly, boldly, diligently, determinedly, toughly, stonily, fervently, stubbornly, undauntedly, enduringly, indomitably, bravely, dauntlessly, stiffly, steadfastly, strongly.

adv.

absolutely (adverb)
decidedly, truly, conclusively.
all (adverb)
resolutely.
decidedly (adverb)
determinedly, strongly.
finally (adverb)
finally, lastly, conclusively, enduringly.
firmly (adverb)
steadfastly, resolutely, tenaciously, indefatigably, intently, obstinately, staunchly, stubbornly, doggedly, persistently.
resolutely (adverb)
deliberately, stubbornly, determinedly, doggedly, dauntlessly, persistently, valiantly, tirelessly, bravely, toughly, intently, loyally, indomitably, resolutely, staunchly, indefatigably, devotedly, diligently, faithfully, heartily, relentlessly, truly, tenaciously, courageously, boldly, pluckily, steadily, fearlessly, decidedly.
tenaciously (adverb)
strongly, stiffly, unflaggingly, enduringly, fervently, obstinately, stonily, undauntedly, bravely, steadfastly.

n.

decisively (noun)
resolutely.

Other synonyms:

adv
determinedly, doggedly, indefatigably, persistently, resolutely, staunchly, steadfastly, tenaciously.

Usage examples for decisively

  1. " You're a fool if you do, Matt," decisively and turning back to his writing. – The Case and The Girl by Randall Parrish
  2. " Yes, but I want to marry him, and I am going to," replied Susan decisively – Virginia by Ellen Glasgow
  3. He walked slowly and decisively down the stairs. – The Year When Stardust Fell by Raymond F. Jones