The term OPERA PART is composed of four different words, each with a different number of letters. ACTE (4 letters) is a French word meaning 'ACT' or 'SCENE'. ARIA (4 letters) is an Italian word referring to a solo song in an opera. ACT (3 letters) is a division of a play or opera, usually consisting of several scenes. SCENA (5 letters) is an Italian word meaning 'SCENE'. Together, these four words refer to the parts of an opera, which is a form of musical theatre that combines music, drama, and dance.