Optimum and Top-notch

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

Top-notch and optimum are semantically related. in tip-top topic. In some cases you can use "Top-notch" instead an adjective "Optimum". informal substitute

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

Top-notch adjective - Of the very best kind.

Optimum and top-notch are semantically related. Sometimes you can replace term "Optimum" with "Top-notch", this terms are similar.