Yep, your right, the word "RAPTURE" is not in the bible. You ask to show you where it is and I can not. I also heard you say that you don't believe in the rapture. I must respectively say that I strongly believe you are wrong in saying this.
First, the word "rapture" comes from the Latin word rapturo, which is a translation of the Greek verb "caught up" that is found in 1 Thessalonians 4:17.
The rapture is the teaching that at or before the return of Christ. Christians dead as well as alive on the earth will be transformed into resurrected bodies and literally be "caught up" into the clouds to meet Jesus.
The verses used to support this truth are:
1 Thessalonians 4:16-18, “For the Lord Himself will descend from heaven with a shout, with the voice of the archangel, and with the trumpet of God; and the dead in Christ shall rise first. 17 Then we who are alive and remain shall be caught up together with them in the clouds to meet the Lord in the air