The word "groanbox" typically refers to an accordion, but there are several synonyms that can be used to describe this musical instrument. Some of these include "squeezebox," "concertina," "melodeon," "button box," and "accordeon." These terms are all used to describe a type of handheld bellows-driven musical instrument that produces sound by pressing buttons or keys. While each of these terms has slightly different connotations and is used in different regions of the world, they all refer to a type of instrument that has been popular for centuries and that continues to be played and enjoyed by musicians and audiences alike.