From The Collaborative International Dictionary of English v.0.48 :
Sanctitude \Sanc"ti*tude\, n. [L. sanctitudo.] Holiness; sacredness; sanctity. [R.] --Milton. [1913 Webster]From WordNet (r) 3.0 (2006) :
sanctitude n 1: the quality of being holy [syn: holiness, sanctity, sanctitude] [ant: unholiness]