blue letter bible reference http://www.blueletterbible.org/lang/Lexicon/Lexicon.cfm?strongs=H6951&t=NASB
“I Y M,
I I Y.” Hebrews 2:12
This "New Testament" verse is the greek translation of Psalm 22:22, the word congregation is the Greek work ekklēsia.
Strongs G1577 pronounced ek-klā-sē'-ä
blue letter bible reference http://www.blueletterbible.org/lang/lexicon/lexicon.cfm?Strongs=G1577&t=NASB
This verse from James shows another word that is translated in the English, from the same Greek word.
Is anyone among you sick? Then he must call for the elders of the church and they are to pray over him, anointing him with oil in the name of the Lord; James 5:14
Synagogue is the building that Jews were meeting in, in New Testament times.
Somewhere along the line, we began using the word "church" for the building where we meet.
So our building had a different name than "their" building so we are different from them. That is wrong.
But ekklesia is not the name of a building and it is synonymous with the word kahal.
So to the best of my ability that is my point.
The ekklesia of God and the kahal of God are the same thing. His story is one story, His vessel in the earth to convey that story is one vessel.