Greatest and Out-of-sight

Greatest adjective - Coming before all others in importance.

Out-of-sight and greatest are semantically related In some cases you can use "Out-of-sight" instead an adjective "Greatest".

Out-of-sight adjective - Of the very best kind.

Greatest and out-of-sight are semantically related in superior topic. Sometimes you can use "Greatest" instead an adjective phrase "Out-of-sight", if it concerns topics such as amazing, most excellent.