Four-star and Well-known

Four-star adjective - Of the very best kind.

Well-known and four-star are semantically related. in eminent topic. In some cases you can use "Well-known" instead an adjective phrase "Four-star", when it comes to topics like high-ranking.

Well-known adjective - Widely known.

Four-star and well-known are semantically related. Sometimes you can use "Four-star" instead an adjective phrase "Well-known".