Post-fixes refer to word parts or characters added to the end of a word or phrase. These additions often change the meaning or function of the word they are added to. Synonyms for post-fixes include suffixes, endnotes, endings, appositions, and postfixes. Suffixes are perhaps the most commonly used synonym for post-fixes and refer specifically to the linguistic addition of word parts at the end of a word. Endnotes refer more specifically to written additions at the end of a document or text. Endings and appositions are more general terms for things added to the end of a word or phrase, while postfixes refer specifically to programming language.