The Collaborative International Dictionary of English v.0.48:

Sanctimony \Sanc"ti*mo*ny\, n. [L. sanctimonia, fr. sanctus
   holy: cf. OF. sanctimonie. See Saint.]
   Holiness; devoutness; scrupulous austerity; sanctity;
   especially, outward or artificial saintliness; assumed or
   pretended holiness; hypocritical devoutness.
   [1913 Webster]

         Her pretense is a pilgrimage; . . . which holy
         undertaking with most austere sanctimony she
         accomplished.                            --Shak.
   [1913 Webster]

WordNet (r) 3.0 (2006):

sanctimony
    n 1: the quality of being hypocritically devout [syn:
         sanctimoniousness, sanctimony]