Is it possible that Pat Robertson doesn't know the term Dominion Theology? I suspect that he knows exactly what it is.
Is it possible that the typical church-going Christian does not know what it is, even though they teach it in their church? Absolutely! If that person has not been under sound teaching, they will come to see Dominionism as mainstream Christian doctrine. When there is a considerable amount of error being mixed in with authentic truth, it is easy to be fooled. Scripture is changed to mean something entirely different than what it was intended to mean.
Pat is clever as a fox. If he was asked if he was a Freemason, he'd deny that too. He teaches the Dominionist doctrine and has been part of fooling unsuspecting Christians for years.