Blue-chip and Top-grade

Blue-chip adjective - Of the very best kind.

Top-grade and blue-chip are semantically related. In some cases you can use "Top-grade" instead an adjective phrase "Blue-chip".

Top-grade adjective - Surpassing in quality.

Blue-chip and top-grade are semantically related. Sometimes you can use "Blue-chip" instead an adjective phrase "Top-grade".