might-have-been (noun) failure: person who does not succeed
Sinonime: aggressive, alarming, apocalyptic, at hand, baleful, baneful, black, bullying, cautionary, close, comminatory, dangerous, dire, fateful, forthcoming, grim, ill-boding, imminent, impendent, impending, inauspicious, intimidatory, looming, loury, lowering, lowery, minacious, near, overhanging, portending, portentous, scowling, sinister, terrorizing, ugly*, unlucky, unpropitious, unsafe, upcoming, warning
Antonime: achiever,
success