What is the largest word in the English dictionary that can be typed using only the top row of letters on a standard keyboard?
Pepperroot, pepperwort, pewterwort, pirouetter, prerequire, pretorture, proprietor, repertoire, tetterwort and typewriter. All ten letters long.
You can get longer words only by forcing constructs such as 'prerepertoire' ('before a repertoire'), or compounds such as 'propropriety' ('being for propriety'), but such constructs are unlikely to be found in a dictionary.
Throwing out another one: what is the only word in the English language that has four pairs of double letters in a row?
