Proparoxytone is a word that describes a specific type of stress pattern in linguistics, where the stress falls on the antepenultimate syllable. However, there are other terms that can be used as synonyms to describe this same stress pattern. These synonyms include oxytone, which refers to words that have stress on the final syllable, paroxytone, which refers to words that have stress on the penultimate syllable, and orthoxytone, which refers to words that have stress on the first syllable. These types of words and their specific stress patterns are important to understanding pronunciation and accent in a language.