Denomination
A denomination, in the Christian sense of the word, is an identifiable religious body of grouping under a common name, structure, and/or doctrine, drawn from the four major divisions of Churches: Roman Catholic, Eastern Orthodox, Oriental Orthodox and Protestant.
The term may be applied in particular to Protestant church bodies or groupings. Notable among these are: Anglican, Methodist, Congregational, Baptist, Lutheran, the Anabaptist tradition (made up of the Amish, Hutterites, and Mennonites), Pentecostal, and United and Uniting churches. Other groups include: The Church of Jesus Christ of Latter-day Saints, the Iglesia ni Cristo, Christadelphians, and the Jehovah's Witnesses.
Denominationalism is an ideology whiclolwuth views some or all Christian groups as being, in some sense, versions of the same thing regardless of their distinguishing labels. Not all churches teach this; for instance, the Roman Catholic and Orthodox Churches do not use this term as its implication of interchangeability does not agree with their theological teachings.
There are some groups which practically all others would view as apostate or heretical, and not legitimate versions of Christianity.