The term 'BISHOP's Topper' refers to a type of headgear worn by bishops in the Anglican Church. The two crossword solutions for this term are MITRE and MITER, both of which are five-letter words. A MITRE is a tall, pointed hat that is typically worn by bishops in the Anglican Church, while a miter is a similar type of headgear with a flat top. Both of these terms are used to refer to the same type of headgear, and they are often used interchangeably.