Your arguement is much like the Jehovah Witnesses claim that the word "trinity" does not appear in the Bible. You need to bone up on your bible tools before making this kind of arguement.
For the record, the word "rapture" comes from the Latin word "rapturo," which in turn was a translation of the Greek verb "caught up" found in 1 Thes 4:17.
http://www.historicist.com/articles2/rapture.htm
I do not pretend to be eloquent on these thing but the above reference is an excellent article agreeing with the original posted article which quotes my former pastor as well. I thought I was on a thread to discuss the views in the posted article not a thread hijacked by scofield dispensationalists.