The Collaborative International Dictionary of English v.0.48:

Goodness \Good"ness\, n. [AS. g[=o]dnes.]
   The quality of being good in any of its various senses;
   excellence; virtue; kindness; benevolence; as, the goodness
   of timber, of a soil, of food; goodness of character, of
   disposition, of conduct, etc.
   [1913 Webster]

WordNet (r) 3.0 (2006):

goodness
    n 1: that which is pleasing or valuable or useful; "weigh the
         good against the bad"; "among the highest goods of all are
         happiness and self-realization" [syn: good, goodness]
         [ant: bad, badness]
    2: moral excellence or admirableness; "there is much good to be
       found in people" [syn: good, goodness] [ant: evil,
       evilness]

Moby Thesaurus II by Grady Ward, 1.0:

175 Moby Thesaurus words for "goodness":
   Christianity, Christlikeness, Christliness, affability,
   affectionateness, agreeability, agreeableness, amenity, amiability,
   amicability, angelicalness, appropriateness, assured probity,
   beauty of holiness, beneficialness, benignancy, benignity,
   blamelessness, bliss, blissfulness, brotherhood, character,
   cleanness, compassion, compatibility, complaisance, congeniality,
   cordiality, correctitude, correctness, decencies, decency,
   decorousness, decorum, delectability, deliciousness, enjoyableness,
   erectness, estimableness, fairness, fear of God,
   feeling of kinship, felicitousness, fellow feeling, fine flavor,
   fitness, fittingness, flavorfulness, flavoriness, flavorousness,
   flavorsomeness, fraternal feeling, full flavor, geniality,
   godlikeness, godliness, godly-mindedness, good character,
   good flavor, good taste, goodliness, goodness of heart,
   gourmet quality, grace, graciousness, gustatory delightfulness,
   harmoniousness, healthfulness, healthiness, heart of gold,
   heavenliness, heavenly-mindedness, high ideals, high principles,
   high-mindedness, holiness, holy-mindedness, honesty, honor,
   honorableness, humaneness, humanity, immaculacy, integrity,
   irreproachability, irreproachableness, justice, justness,
   kindheartedness, kindliness, kindly disposition, kindness,
   loving kindness, lusciousness, mellifluousness, mellowness, merit,
   moral excellence, moral rectitude, moral strength, morale,
   morality, niceness, nobility, normality, normativeness,
   odor of sanctity, oh, otherworldliness, pleasance, pleasantness,
   pleasantry, pleasingness, pleasurability, pleasurableness,
   pleasure, pleasurefulness, principles, probity, properness,
   proprieties, propriety, pureness, pureness of heart, purity,
   quality, rapport, rectitude, reputability, respectability,
   right conduct, right taste, righteousness, rightness, sainthood,
   saintlikeness, saintliness, saintship, salubriousness, salubrity,
   salutariness, sanctitude, sanctity, sapidity, savoriness,
   scrumptiousness, seemliness, seraphicalness, softheartedness,
   soul of kindness, spiritual-mindedness, spirituality,
   stainlessness, suitability, superiority, sweetness, sympathy,
   tastiness, tenderheartedness, toothsomeness, unearthliness,
   unimpeachability, unimpeachableness, unspottedness, unworldliness,
   uprightness, upstandingness, virtue, virtuousness, warmheartedness,
   warmth, warmth of heart, welcomeness, wholesomeness, worthiness



Easton's 1897 Bible Dictionary:

Goodness
   in man is not a mere passive quality, but the deliberate
   preference of right to wrong, the firm and persistent resistance
   of all moral evil, and the choosing and following of all moral
   good.