Non-denominational is a word that is often used to describe something that is not associated with any particular religious denomination. However, there are several other words that can be used to express the same idea. For example, one might use the term interfaith or multi-faith to describe something that accommodates multiple religious beliefs or affiliations. Secular is another word that conveys a lack of religious affiliation or involvement. Meanwhile, ecumenical and universal are both words that can be used to describe something that is inclusive of different religious traditions or viewpoints. Ultimately, the choice of word will depend on the specific context and intended meaning.