The word "impossible" dropped in use by 50% over the course of the 20th century
5
A group of pugs is called a grumble.
10
Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
2
Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
112
A group of ferrets is called a business.
6