In the original language the word was for believers was the ekklesia.
1577 ekklēsía(from 1537 /ek, "out from and to" and 2564 /kaléō, "to call") – properly, people called out from the world and to God, the outcome being the Church (the mystical body of Christ) – i.e. the universal (total) body of believers whom God calls out from the world and into His eternal kingdom.
https://biblehub.com/greek/1577.htm
If you really want to get technical the only modern day denomination mentioned in the NT is Baptist...as in John the Baptist!
Will the Roman Catholic denomination withstand all of its problems? Time will tell. But because a "church" withstands time means nothing.
Lots of other "churches" have been around a long time...but they're not Christian.
Do not forget John the Baptist was not Jesus who delegated the representatives of the Church he founded and those delegates successors are historically known.
The Catholic Church itself recognizes the partial, but not entire
inclusion of all Christians in its fold.