crack of doom(n = noun.time) day of judgement, day of judgment, day of reckoning, doomsday, end of the world, eschaton, judgement day, judgment day, last day, last judgement, last judgment - (New Testament) day at the end of time following Armageddon when God will decree the fates of all individual humans according to the good and evil of their earthly lives;
is a kind of day

N  end, close, termination, desinence, conclusion, finis, finale, period, term, terminus, endpoint, last, omega, extreme, extremity, gable end, butt end, fag-end, tip, nib, point, tail, verge, tag, peroration, bonne bouche, bottom dollar, tail end, rear guard, consummation, denouement, finish, fate, doom, doomsday, crack of doom, day of Judgment, dies irae, fall of the curtain, goal, destination, limit, determination, expiration, expiry, extinction, extermination, death, end of all things, finality, eschatology, break up, commencement de la fin, last stage, turning point, coup de grace, deathblow, knock-out-blow, sockdolager, ending, final, terminal, definitive, crowning, last, ultimate, hindermost, rear, caudal, vergent, conterminate, conterminous, conterminable, ended, at an end, settled, decided, over, played out, set at rest, conclusive, penultimate, last but one, last but two, unbegun, uncommenced, fresh, finally, in fine, at the last, once for all, as high as Heaven and as deep as hell, deficit omne quod nascitur, en toute chose il faut considerer la fin, finem respice, ultimus Romanorum.

N  futurity, futurition, future, hereafter, time to come, approaching time, coming time, subsequent time, after time, approaching age, coming age, subsequent age, after age, approaching days, coming days, subsequent days, after days, approaching hours, coming hours, subsequent hours, after hours, approaching ages, coming ages, subsequent ages, after ages, approaching life, coming life, subsequent life, after life, approaching years, coming years, subsequent years, after years, morrow, millennium, doomsday, day of judgment, crack of doom, remote future, approach of time advent, time drawing on, womb of time, destiny, eventuality, heritage, heirs posterity, prospect, foresight, future, to come, coming, next, near, close at hand, eventual, ulterior, in prospect, prospectively, hereafter, in future, kal, tomorrow, the day after tomorrow, in course of time, in process of time, in the fullness of time, eventually, ultimately, sooner or later, proximo, paulo post futurum, in after time, one of these days, after a time, after a while, from this time, henceforth, henceforwards, thence, thenceforth, thenceforward, whereupon, upon which, soon, on the eve of, on the point of, on the brink of, about to, close upon, quid sit futurum cras fuge quaerere.

N  destruction, waste, dissolution, breaking up, diruption, disruption, consumption, disorganization, fall, downfall, devastation, ruin, perdition, crash, eboulement, smash, havoc, delabrement, debacle, break down, break up, fall apart, prostration, desolation, bouleversement, wreck, wrack, shipwreck, cataclysm, washout, extinction, annihilation, destruction of life, knock-down blow, doom, crack of doom, destroying, demolition, demolishment, overthrow, subversion, suppression, abolition, biblioclasm, sacrifice, ravage, razzia, inactivation, incendiarism, revolution, extirpation, beginning of the end, commencement de la fin, road to ruin, dilapidation, sabotage, destroyed, perishing, trembling to its fall, nodding to its fall, tottering to its fall, in course of destruction, extinct, all-destroying, all-devouring, all-engulfing, destructive, subversive, ruinous, devastating, incendiary, deletory, destroying, suicidal, deadly, with crushing effect, with a sledge hammer, delenda est Carthago, dum Roma deliberat Saguntum perit, ecrasez l'infame.

crack, crack addict, crack down, crack down on, crack shot, crack up, crack willow, doom, fatigue crack, nasty crack, prophet of doom, quarter crack, sand crack, take a crack at, toe crack