Triality is a term that refers to the concept of threefoldness or the state of being composed of three parts. Although triality may seem like an obscure term, there are numerous synonyms that describe this concept. Some possible synonyms include triple, trifecta, trilogy, triplex, tripartite, triple-decker, triad, triune, and triplicate. Each of these terms has slightly different implications or contexts, but all share the common theme of threeness or threefoldness. Some additional related words include trinity, trio, troika, and triplet. Whether you're writing about mathematical concepts, spiritual beliefs, or anything in between, these synonyms can help you describe the unique quality of triality.