Foremost and Top-notch

Foremost adjective - Coming before all others in importance.

Top-notch and foremost are semantically related. in number-one topic. In some cases you can use "Top-notch" instead an adjective "Foremost". informal substitute

Top-notch adjective - Of the very best kind.

Foremost and top-notch are semantically related. Sometimes you can use "Foremost" instead an adjective phrase "Top-notch".