Seven key passages in the New Testament describe the Church.
The answer to the second question depends upon the answer to the first.
Just because the same word is used does not ensure that it always has the same meaning.
A careful examination of the Scriptures reveals that when Jesus and the Twelve used the word ἐκκλησία it referred to a group of Jews who believed Jesus was the promised Messiah.
The first is God explicitly stated through the apostle Paul that the Church, the Body of Christ, was a “secret,” (μυστήριον).
This presents a serious problem for the traditional view because Paul made this declaration long after Pentecost. No Biblical evidence exists to support the view that anyone at Pentecost recognized that the Church, i.e., the Body of Christ, had come into existence.
This means that the Church as the Body of Christ was an unknown entity. Nothing from the record at Pentecost indicates the Twelve knew anything about the Body of Christ.
Such terminology is absent from the Gospels and the letters of Peter, James, John, Jude.
One of the silversmiths named Demetrius stirred up a riot against Paul.
Each of the verses below contains the Greek word ἐκκλησία.
The prophets, John, and Jesus had revealed nothing of the fact that Jew and Gentile would be equal in Christ in a Body.
On the contrary, Peter quoted Joel and expected the “sun to be turned into darkness and the moon into blood” (Acts 2.15-21).