Church- group of belivers of the almighty God.
Denominational church- Seperation of THE church.
Denominational Churches have doctorines of their own rooted in traditions of men, of which the word says "makes void the word of God" in ones walk.
It is possible that some do not embrace traditions of men while studing the word and even that is up for debate in some circles. So be it!
I can list 3 churches that were NOT denominational!
1)The 12 disciples of Christ
2) the church of Smyrna Rev. 2:8-11
3) The church of Philadelphia Rev.3:7-13
Also in the later days there are two churches that the two witnesses represent and are over and those will be (are NON denominational>
Those that have faith in the word can and do take faith in these as being true (non denominational.) There remains a true following throughout all time and space!