Antepenult is a term in linguistics that refers to the third-from-last syllable in a word. While this word might not be commonly used in everyday conversation, there are several synonyms that can be used to convey the same meaning. Some of these synonyms include "preantepenultimate," "third-to-last," and "ultimate-third." Additionally, in some cases, the phrase "penultimate syllable" can be used in a similar way to denote the same concept. Whatever terminology is used, understanding the antepenult or third-from-last syllable of a word can be useful for those studying language and linguistics, as well as those who want to expand their vocabulary.