Four-star and Upper-class

Four-star adjective - Of the very best kind.

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

Upper-class adjective - Of high birth, rank, or station.

Four-star and upper-class are semantically related in eminent topic. Sometimes you can use "Four-star" instead an adjective phrase "Upper-class", if it concerns topics such as high-ranking.