Art Tatum was an American jazz pianist known for his virtuosic improvisations and technical mastery of the instrument. When looking for synonyms to describe Tatum's playing, one might use words like skilled, proficient, accomplished, or skilled. These adjectives capture the sense of expertise and talent that Tatum brought to his music. One might also describe his style as innovative, creative, or inventive, as he was known for pushing the boundaries of traditional jazz piano playing. Ultimately, there is no single word that can fully encapsulate the brilliance of Art Tatum, but a combination of these adjectives can begin to capture the essence of his musical artistry.