The word "Dubyuh" is a slang term used to refer to the letter "W" in the English alphabet. Its pronunciation is similar to that of the letter "W" in the word "double". Some synonyms for the word "Dubyuh" include "double-u", "wee", or just the letter itself, "W". It is important to note that "Dubyuh" is not a formal or proper way to refer to the letter "W" and should be avoided in formal writing or speech. Instead, it is best to use the appropriate term, "double-u", to ensure clarity and professionalism.