Switching letters is called spoonerism. For example, saying "jag of Flapan", instead of "flag of Japan".
2
The word "listen" contains the same letters as "silent."
135
Longest officially recognized place name is Taumatawhakatangihangakoauauotamateapokaiwhenuakitanatahu.
112
The word 'mile' is derived from the Latin word for 1,000 - the number of paces it took the average Roman!
6
There are only four words in the English language which end in “dous”:
tremendous, horrendous, stupendous, and hazardous.
tremendous, horrendous, stupendous, and hazardous.
175
A group of ferrets is called a business.
6