Fun4Word is an add-in (that is an addition) for Microsoft Word. It integrates with Word through a menu. Its amusing and funny formattings can be applied to parts of selected text or to a whole document. Fun4Word is able to write mirror words or whole sentences, to mix the words of a sentence, to remove all the vowels from the words, to color every word of a document a different color, to give an aspect to wave to a sentence, to cipher the text, and more. Fun4Word has 23 of these functions.