I've never denied that pask and Easter were at one time interchangeable, but that time had passed by the time the KJV was made, as proven by the earlier Geneva Bible's using 'passover', and the KJV's using 'passover all but that one time.
By 1611, Easter had much-more importance to those who claimed to be Christians, including both Catholix & Protestants. The AV men placed an "Easter-Finder in the AV 1611, calling Easter & Christmas the two holiest days of the year. They certainly knew Easter from passover.
And there's simply no getting away from the FACT that Herod was waiting for PASSOVER to end before turning Peter over to the Jews.
Cuz you say so. Cuz there was soooo. much time passed from Tyn. to 1603.