The Collaborative International Dictionary of English v.0.48:

Baseness \Base"ness\, n.
   The quality or condition of being base; degradation;
   vileness.
   [1913 Webster]

         I once did hold it a baseness to write fair. --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

baseness
    n 1: unworthiness by virtue of lacking higher values [syn:
         baseness, sordidness, contemptibility,
         despicableness, despicability]

Moby Thesaurus II by Grady Ward, 1.0:

163 Moby Thesaurus words for "baseness":
   abjectness, abominability, abominableness, arrantness,
   atrociousness, awfulness, badness, beastliness, beggarliness,
   bestiality, brutality, chicanery, coarseness, commonness,
   commonplaceness, contemptibility, contemptibleness, contrariety,
   cravenness, crudeness, crumminess, dastardliness, debasement,
   deficiency, degradation, depravity, desertion under fire,
   despicability, despicableness, detestableness, devilishness,
   devilry, deviltry, direness, disgustingness, dreadfulness,
   egregiousness, enormity, evilness, execrableness, failure, fewness,
   fiendishness, filth, flagitiousness, foulness, fourth-rateness,
   fulsomeness, grossness, harshness, hatefulness, heinousness,
   hellishness, helotism, helotry, homeliness, horribleness,
   humbleness, ignobility, imperfection, inadequacy, incompetence,
   infamousness, inferiority, inferiorness, iniquitousness,
   insufficiency, knavery, knavishness, littleness, loathsomeness,
   lousiness, lowliness, lowness, maladroitness, meanness, mediocrity,
   menialness, miserableness, monstrousness, moral turpitude,
   nastiness, naughtiness, nauseousness, nefariousness, noisomeness,
   notoriousness, noxiousness, objectionability, objectionableness,
   obnoxiousness, obscenity, odiousness, offensiveness, ordinariness,
   outrageousness, paltriness, peonage, pettiness, plebeianism,
   pokiness, poltroonery, poltroonishness, poltroonism, poorness,
   pusillanimity, pusillanimousness, putridity, putridness, rankness,
   rascality, rascalry, rebarbativeness, repellence, repellency,
   reprobacy, repugnance, repulsiveness, roguery, roguishness,
   rottenness, scabbiness, scampishness, scandalousness, scoundrelism,
   scrubbiness, scruffiness, scumminess, scurviness, second-rateness,
   serfdom, servility, shabbiness, shamefulness, shoddiness,
   sinfulness, skedaddling, slavery, slavishness, smallness,
   sordidness, squalidness, squalor, submissiveness, subnormality,
   subservience, subserviency, terribleness, the pits, third-rateness,
   triviality, turpitude, uncleanness, unskillfulness,
   unspeakableness, viciousness, vileness, villainousness, villainy,
   vulgarity, wickedness, worthlessness, wretchedness