sure enough, sure as shooting, surely, sure, for certain, for sure, definitely, undoubtedly, probably, obviously, more...

uncertainly, doubtfully, questionably, unsurely, ambiguously

definitely, positively, absolutely, indubitably, undoubtedly, unquestionably, unmistakably, more...

without a doubt,   "of course!",   most definitely,   with conviction,   beyond a doubt,   sure as hell,   without any doubt,   "you betcha",   there is no doubt,   no doubt about it