Optimum and Tough

Optimum adjective - Most desirable possible under a restriction expressed or implied.

Tough and optimum are semantically related. In some cases you can use "Tough" instead an adjective "Optimum".

Nearby Words: optimal, optimization, optimize, optimise, optimally

Tough adjective - Not easily chewed.

Optimum and tough are semantically related. Sometimes you can use "Optimum" instead an adjective "Tough".

Nearby Words: toughness, toughen, toughening, tougher, toughed