multidenominational

From multi- +‎ denominational.

multidenominational (comparative more multidenominational, superlative most multidenominational)

1. having multiple denominations
   • 2007 August 25, Katie Zezima, “A Summer Island Rallies Around Its Aging Chapel”, in New York Times‎^[1]:

     The chapel has been multidenominational Christian for decades, though rabbis have occasionally presided over Jewish services from its wooden altar.