WordNet (r) 3.0 (2006):

name day
    n 1: the feast day of a saint whose name one bears

Moby Thesaurus II by Grady Ward, 1.0:

33 Moby Thesaurus words for "name day":
   anniversary, annual holiday, bicentenary, bicentennial, biennial,
   birthday, bissextile day, centenary, centennial, commemoration,
   decennial, diamond jubilee, golden wedding anniversary, holy days,
   immovable feast, jubilee, leap year, natal day, octennial,
   quadrennial, quasquicentennial, quincentenary, quincentennial,
   quinquennial, septennial, sesquicentennial, sextennial,
   silver wedding anniversary, tercentenary, tercentennial,
   tricennial, triennial, wedding anniversary