Best and Unexampled

Best adjective - (superlative of `good') having the most positive qualities.

Unexampled and best are semantically related In some cases you can use "Unexampled" instead an adjective "Best". rare substitute

Unexampled adjective - Having no equal or rival for excellence or desirability.

Best and unexampled are semantically related in superior topic. Sometimes you can use "Best" instead an adjective "Unexampled", if it concerns topics such as one-of-a-kind.