What is a perfect game score in ten-pin bowling?

A pentad is a group of how many? A pentadecagon is a polygon with how many sides? The "perambulator", or "pram" to the Brits, was invented in 1733 by William Kent for the Duke of Devonshire's children.… What word names a perceived snub or act of contempt? A printer's "perfect" one of these contains 516 sheets instead of 500. What? What is an unintended period of silence during a radio broadcast called? A person described as loquacious does what a lot? What is a person from Harrisburg or Philadelphia called?