The term 'Looney Tunes Manufacturer' is solved by the four-letter word 'ACME'. ACME is a fictional corporation that appears in the Looney Tunes and Merrie Melodies cartoons. It is best known for its products, which are often used as weapons or gags in the cartoons. The company's name is derived from the initials of the phrase 'A Company Making Everything'. ACME has become a popular symbol in popular culture, representing the idea of an all-encompassing company that can provide anything.