It is the word used to describe the process found in 1 Thess 4: 17After that, we who are still alive and are left will be caught up together with them in the clouds to meet the Lord in the air. And so we will be with the Lord forever. 18Therefore encourage each other with these words.
In that verse, the word for "caught up" is the Greek word harpazo (harpgesometha). That Greek word in Latin is rapiemur....and it's obvious how the English rapture is related to the Latin "rapiemur."
So, it's inappropriate to say that "rapture" does not appear in the bible. It certainly does.
What you might want to say is that you disagree with a premillennial doctrine of the rapture, because you, as a Catholic, have been primarily taught an amillennial doctrine.
So the rapture gets the series of events wrong and put the cart before the horse?
To the point, Chiliasm (Premillennialism, etc.) was condemned as a heresy in 381 AD.