The word "tilburries" is spelled with two R's, despite the sound only being pronounced once. This is because the word derives from the name of a type of horse-drawn carriage called a "tilbury", which was named after the English town of Tilbury. The "-ies" suffix is added to indicate that there is more than one. The word is pronounced /tɪlˈbʌrɪz/ (till-BUR-eez) with emphasis on the second syllable.