Undenominational
Part of speech: adjective
Definition: Not denominational, used e.g. of a church.
Nonsectarian
Part of speech: adjective
Definition: Of or pertaining to nonsectarianism.
Part of speech: noun
Definition: One who is not a sectarian.
Undenominational as an adjective is not denominational, used e.g. of a church. while Nonsectarian as an adjective is of or pertaining to nonsectarianism.
Part of speech: adjective
Definition: Not denominational, used e.g. of a church.
Part of speech: adjective
Definition: Of or pertaining to nonsectarianism.
Part of speech: noun
Definition: One who is not a sectarian.
We hope you now know whether to use Undenominational or Nonsectarian in your sentence.