believably, credibly, plausibly, probably

improbably, preposterously, absurdly, impossibly, plausibly, unrealistically, bizarrely, astonishingly, suspiciously, unconvincingly, dubiously, dweebish, ludicrously, comically, enviably, disturbingly, fatuously, laughably, anachronistically, staggeringly, vexingly, spuriously, sunnily, scarily, ridiculously, engagingly, broodingly, disappointingly, inanely, unnaturally, perplexingly, quixotically, hugger mugger, charmingly, vapidly, idealistically, misleadingly, distressingly, breathtakingly, deceptively, youthfully, illogically, amusingly, impractically, fabulously, puzzlingly, outlandishly, gratifyingly, entertainingly, nebbishy, jarringly, gloriously, mendaciously, blandly, stunningly, incongruously, questionably, doubtfully, inordinately, forgivably, outrageously, implacably, speciously, lunkheaded, startlingly, embarrassingly, superficially, darkly, boyishly, deus ex machina, imprudently, contradictorily, irritatingly, preternaturally, hyperbolically, disingenuously, villainously, passingly, deviously, blithely, delightfully, unfathomably, stupidly, dazzlingly, shockingly, eccentrically, pitiably, frighteningly, curiously, archly, murkily, winningly, earthily, condescendingly, disconcertingly, deliriously, ploddingly, luridly, strikingly, dashingly, comfortingly, sketchily

incredibly, unbelievably