The phrase "best of best" is often used to describe something that is unsurpassed in terms of quality or excellence. However, there are many synonyms that can be used in place of this phrase. Some examples include "top-notch," "elite," "superlative," "premier," "finest," "supreme," "peerless," "unsurpassed," "exemplary," and "champion." Each of these words conveys a sense of exceptionalism and superiority, making them suitable alternatives to "best of best." Whether you are describing a work of art, a sports team, or a product, these synonyms can help you express the highest possible degree of quality and excellence.