The term "French harp" is commonly used to refer to a specific type of harmonica. However, there are several other synonyms that are used interchangeably for this instrument. One such term is "diatonic harmonica," which refers to the fact that this instrument only plays notes from a specific diatonic scale. Another synonym is "blues harp," which is used because this harmonica is commonly used in blues music. The term "10-hole harmonica" is also occasionally used, as this instrument typically has 10 holes which the player uses to produce different notes. Regardless of what term is used, the French harp remains a popular and versatile instrument for musicians around the world.