Synonyms of definitely

1 Syllable

yep, yes

2 Syllables

flatly, staunchly, roger, doubtless, plainly, clearly, truly

3 Syllables

exactly, visibly, surely, pointedly, disjointly, audibly, overtly, doubtlessly, capably, cogently, tellingly, finally, easily, obviously, expressly

4 Syllables

confirmedly, assuredly, minutely, concretely, undoubtedly, unshakably, undeniably, transparently, sonorously, infallibly, precisely, decidedly, unfailingly, explicitly

5 Syllables

decisively, separately, irrevocably, unambiguously, absolutely, incontestably, unquestionably, indubitably, positively, specifically, unmistakably, recognizably, penetratingly, dramatically, productively, efficaciously, persuasively, unimpeachably, effectively, irrefutably

6 Syllables

indicatively, unequivocally, categorically