THESAURUS
bastard
SOB, affected, apocryphal, artificial, assumed, bantling, bar sinister, baseborn,
bastard child, bastardy, bird, blackguard, bogus, brummagem, bugger, by-blow, cat, chap, character, colorable, colored, counterfeit, counterfeited, creep, criminal, cross, crossbred, crossbreed, devil, distorted, dressed up, duck, dummy, embellished, embroidered, enfant terrible, ersatz, evildoer, factitious, fake, faked, false, falsified, fart, fatherless, feigned, feller, fellow, fictitious, fictive, garbled, guy, half blood, half-breed, heel, hood, hooligan, illegitimacy, illegitimate, illegitimate child, imitation, jasper, jerk, joker, junky, knave, lad, limb, louse, love child, lowlife, make-believe, malefactor, man-made, meanie, misbegotten, mischief, miscreant, miscreated, mock, mongrel, mother, mule, natural, offender, perverted, phony, pill, pinchbeck, pretended, pseudo, put-on, quasi, queer, rapscallion, rascal, rat, reprobate, rogue, scalawag, scoundrel, self-styled, sham, shit, shithead, shitheel, shoddy, simulated, sinner, so-called, soi-disant, spurious, stinkard, stinker, stud, supposititious, synthetic, tin, tinsel, titivated, turd, twisted, unauthentic, ungenuine, unnatural, unreal, warped
ROGET THESAURUS
bastard
Undueness
N
undueness, malum prohibitum, impropriety, illegality, falseness, emptiness of title, invalidity of title, illegitimacy, loss of right, disfranchisement, forfeiture, usurpation, tort, violation, breach, encroachment, presumption, assumption, seizure, stretch, exaction, imposition, lion's share, usurper, pretender, undue, unlawful, unconstitutional, illicit, unauthorized, unwarranted, disallowed, unallowed, unsanctioned, unjustified, unentitled, disentitled, unqualified, disqualified, unprivileged, unchartered, illegitimate,
bastard, spurious, supposititious, false, usurped, tortious, undeserved, unmerited, unearned, unfulfilled, forfeited, disfranchised, improper, unmeet, unfit, unbefitting, unseemly, unbecoming, misbecoming, seemless, contra bonos mores, not the thing, out of the question, not to be thought of, preposterous, pretentious, would-be, filius nullius.