Eighty eights is a term that refers to pianos. And, there are several synonyms that one can use instead of the term eighty eights. Some of the common synonyms are grand piano, concert piano, and acoustic piano. Grand piano is a popular term used for a large, horizontal piano, often used in concerts. Concert piano is a term primarily used for the piano that is particularly suitable for concerts. Acoustic piano is a term that refers to any type of piano that uses a mechanism to produce the sound. Overall, there are several terms to describe the elegance and beauty of the eighty eights.