1 certainly, surely, to be sure, doubtless(ly), undoubtedly, undeniably, definitely, positively, absolutely, exactly, just so, actually, truly, truthfully, seriously, (all) joking aside, in (point of) fact, of course, really, in reality, to be realistic, naturally, upon my word, on my honour, on my oath, Brit rather, Colloq no kidding:
Indeed, that is the news he has been expecting.
2 what is more, still, not to say, as a matter of fact, if the truth be known, to say the least:
His had been a depressing, indeed miserable childhood.
3 Is that so!, You don't say!, Really!, By George!, By Jove!, (Upon) my word!, My goodness!, Goodness!, Gracious!, Mercy!, Good Lord!, Good heavens!, My stars!, Fancy that!, Imagine (that)!, Well, I'll be (damned)!, Colloq Brit Blimey!, Cor!, Crikey!:
'I've torn up the winning lottery ticket.' 'Indeed!'