The Collaborative International Dictionary of English v.0.48:

Sainthood \Saint"hood\, n.
   1. The state of being a saint; the condition of a saint.
      --Walpole.
      [1913 Webster]

   2. The order, or united body, of saints; saints, considered
      collectively.
      [1913 Webster]

            It was supposed he felt no call to any expedition
            that might endanger the reign of the military
            sainthood.                            --Sir W.
                                                  Scott.
      [1913 Webster]

WordNet (r) 3.0 (2006):

sainthood
    n 1: saints collectively
    2: the status and dignity of a saint

Moby Thesaurus II by Grady Ward, 1.0:

50 Moby Thesaurus words for "sainthood":
   Christianity, Christlikeness, Christliness, angelicalness,
   beatification, beatitude, beauty of holiness, blessedness,
   blessing, canonization, consecration, dedication, devotion,
   enshrinement, exaltation, fear of God, glorification, godlikeness,
   godliness, godly-mindedness, goodness, grace, hallowing,
   heavenliness, heavenly-mindedness, holiness, holy-mindedness,
   justification, justification by works, odor of sanctity,
   otherworldliness, pureness, pureness of heart, purification,
   purity, righteousness, sainting, saintlikeness, saintliness,
   saintship, sanctification, sanctitude, sanctity, seraphicalness,
   setting apart, spiritual-mindedness, spirituality, state of grace,
   unearthliness, unworldliness