undenominational

As a noun church

is a Christian house of worship; a building where religious services take place.

As a verb church

is to conduct a religious service for (a woman) after childbirth.

As a proper noun Church

is {{surname}.

As an adjective undenominational is

not denominational, used e.g. of a church.

As adjectives the difference between denominational and undenominational

is that denominational is of or pertaining to a denomination while undenominational is not denominational, used eg of a church.