The word "church" is never used in the New Testament  -  King James required that word to be added in place of "congregation". The original word  is "ekklesia" or ecclesia, meaning "the called out ones".

Prior to the KING JAMES version,  this word EKKLESIA was translated more closely to the original meaning. King James required them to use the word CHURCH because it supported the "institution" of the Church  - which was his source of power. It was manipulation. He also changed other words for the same reason.....like he changed the word "overseers" to Bishops. The phrase "those who led you" or "those who help you" he changed to "those who have rule over you".