Outside of Jerusalem, on Sabbath day, the Israelites gather in places they call synagogues. Synagogues are not temples because there is only one Temple which was located in Jerusalem. Likewise, outside of Israel, because of the Greek language, Christians go to churches in the English language. It is the same idea of a place of gathering of believers in God outside of the Temple.
Luke 4:14-15 EMTV
(14) Then Jesus returned in the power of the Spirit to Galilee, and news about Him went out through all the surrounding region.
(15) And He taught in their synagogues, being glorified by all.
I would prefer 'synagogues' to remind the unity of the Faith because we read that, before the advent of Jesus in Judaism, the Gentiles joined the Israelites in their synagogues to worship the God of Israel. With the advent of Jesus, Judaism has not gone to oblivion. In fact, Christianity is Judaism because Jesus did not about the New Testament portion of the Bible when He declared that the Old Testament is about Him. Also, the founders of the Faith were Israelites who also worshiped in synagogues, including Jesus.
Acts 11:26 Darby
(26) And having found him , he brought him to Antioch. And so it was with them that for a whole year they were gathered together in the assembly and taught a large crowd: and the disciples were first called Christians in Antioch
The Disciples just happened to be called Christians because they believe in the Gospel of the Judaism of John the Baptist and Jesus. In fact, when you read the phrase 'they were gathered together' in the translation, the Greek language actually says that 'they were synagogued'.
With time, Christianity (Discipleship) has been compromised, adulterated, hijacked by many, even if their core doctrines are plainly condemned by Moses.
I am trying to coin and adopt the word 'Christianous' to more closely identify with ancient everlasting apostolic Judaism than modern Christianity. We should adopt the word 'Christianousness' with the same spirit of relating with the Judaism of Jesus and His Apostles. The words 'Christianous' and 'Christianousness' sound weird for now, but they will eventually catch on during the millennia to come.