definitely (adverb)
Synonyms:
surely, undoubtedly, unquestionably, clearly, doubtless, assuredly, undeniably, necessarily, naturally, positively, doubtlessly, knowingly.
More certainly synonyms
most certainly, unconditionally, decidedly, needless, needless to say, without doubt, without question, without any doubt, definitively, admittedly, presumably, quite naturally, without saying, evidently, apparently, explicitly, infallibly, unequivocally, uniquely, unambiguously, without fail, correctly, indubitable, undoubted, unmistakable, indisputable, unquestionable, undeniable, undisputed, definite, arguably, probably, possibly, perhaps, maybe, understandably, unfailingly, invariably, inevitably, always, no doubt, doubt, likely, most likely, be no doubt, too, already, unanimously,