Jet set and Upper-class

Jet set noun - A set of rich and fashionable people who travel widely for pleasure.

Upper-class and jet set are semantically related In some cases you can replace phrase "Upper-class" with "Jet set", this phrases are similar.

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

Jet set and upper-class are semantically related in cream of society topic. Sometimes you can use "Jet set" instead a noun phrase "Upper-class".