1.  repudiation(n = noun.communication) renunciation - rejecting or disowning or disclaiming as invalid; "Congressional repudiation of the treaty that the President had negotiated"
is a kind of rejection
has particulars: disclaimer, disowning, disownment
Derived form verb repudiate₁

2.  repudiation(n = noun.communication) - refusal to acknowledge or pay a debt or honor a contract (especially by public authorities); "the repudiation of the debt by the city"
is a kind of refusal
Derived forms verb repudiate₂, verb repudiate₃

3.  repudiation(n = noun.act) debunking - the exposure of falseness or pretensions; "the debunking of religion has been too successful"
is a kind of exposure
Derived form verb repudiate₄

   The act of repudiating, or the state of being repuddiated; as, the repudiation of a doctrine, a wife, a debt, etc. [1913 Webster]

   One who favors repudiation, especially of a public debt. [1913 Webster]

N  rejection, repudiation, exclusion, refusal, declination, rejected, reject, rejectaneous, rejectious, not chosen, to be thought of, out of the question, neither, neither the one nor the other, no, non haec in faedera.

N  exclusion, nonadmission, omission, exception, rejection, repudiation, exile, noninclusion, preclusion, prohibition, separation, segregation, seposition, elimination, expulsion, cofferdam, excluding, exclusive, excluded, unrecounted, not included in, inadmissible, exclusive of, barring, except, with the exception of, save, bating, exclusion, seclusion, exclusion, seclusion, privacy, retirement, reclusion, recess, snugness, delitescence, rustication, rus in urbe, solitude, solitariness, isolation, loneliness, estrangement from the world, voluntary exile, aloofness, cell, hermitage, convent, sanctum sanctorum, depopulation, desertion, desolation, wilderness, howling wilderness, rotten borough, Old Sarum, exclusion, excommunication, banishment, exile, ostracism, proscription, cut, cut direct, dead cut, inhospitality, inhospitableness, dissociability, domesticity, Darby and Joan, recluse, hermit, eremite, cenobite, anchoret, anchorite, Simon Stylites, troglodyte, Timon of Athens, Santon, solitaire, ruralist, disciple of Zimmermann, closet cynic, Diogenes, outcast, Pariah, castaway, pilgarlic, wastrel, foundling, wilding, secluded, sequestered, retired, delitescent, private, bye, out of the world, out of the way, the world forgetting by the world forgot, snug, domestic, stay-at-home, unsociable, unsocial, dissocial, inhospitable, cynical, inconversable, unclubbable, sauvage, troglodytic, solitary, lonely, lonesome, isolated, single, estranged, unfrequented, uninhabitable, uninhabited, tenantless, abandoned, deserted, deserted in one's utmost need, unfriended, kithless, friendless, homeless, lorn, forlorn, desolate, unvisited, unintroduced, uninvited, unwelcome, under a cloud, left to shift for oneself, derelict, outcast, banished, noli me tangere, among them but not of them, and homeless near a thousand homes I stood, far from the madding crowd's ignoble strife, makes a solitude and calls it peace, magna civitas magna solitudo, never less alone than when alone, O sacred solitude! divine retreat!.

N  abrogation, annulment, nullification, recision, vacatur, canceling, cancel, revocation, revokement, repeal, rescission, defeasance, dismissal, conge, demission, bounce, deposal, deposition, dethronement, disestablishment, disendowment, deconsecration, sack, walking papers, pink slip, walking ticket, yellow cover, abolition, abolishment, dissolution, counter order, countermand, repudiation, retraction, retractation, recantation, abolitionist, abrogated, functus officio, Int, get along with you!, begone!, go about your business!, away with!.

N  nonobservance, evasion, inobservance, failure, omission, neglect, laches, laxity, informality, infringement, infraction, violation, transgression, piracy, retraction, retractation, repudiation, nullification, protest, forfeiture, lawlessness, disobedience, bad faith, violating, lawless, transgressive, elusive, evasive, unfulfilled &c (fulfill).

N  nonpayment, default, defalcation, protest, repudiation, application of the sponge, whitewashing, insolvency, bankruptcy, failure, insufficiency, run upon a bank, overdrawn account, waste paper bonds, dishonored bills, protested bills, bogus check, bogus cheque, rubber check, bankrupt, insolvent, debtor, lame duck, man of straw, welsher, stag, defaulter, levanter, not paying, non-paying, non-performing, in debt, behindhand, in arrear, behind in payments, in arrears, beggared, unable to make both ends meet, minus, worse than nothing, worthless, insolvent, bankrupt, in the gazette, gazetted, unpaid, gratis, unremunerated.

N  negation, abnegation, denial, disavowal, disclaimer, abjuration, contradiction, contravention, recusation, protest, recusancy, flat contradiction, emphatic contradiction, emphatic denial, dementi, qualification, repudiation, retraction, confutation, refusal, prohibition, denying, denied, contradictory, negative, negatory, recusant, at issue upon, no, nay, not, nowise, not a bit, not a whit, not a jot, not at all, nohow, not in the least, not so, negative, negatory, no way, no such thing, nothing of the kind, nothing of the sort, quite the contrary, tout au contraire, far from it, tant s'en faut, on no account, in no respect, by no, by no manner of means, negatively, never, never in a million years, at no time, there never was a greater mistake, I know better, non haec in faedera, a thousand times no.