Jet-black and Jumbo jet

Jet-black adjective - Of the blackest black; similar to the color of jet or coal.

Jumbo jet and jet-black are semantically related. In some cases you can use "Jumbo jet" instead a noun phrase "Jet-black".

Jumbo jet noun - A very large jet plane.

Jet-black and jumbo jet are semantically related. Sometimes you can replace phrase "Jet-black" with "Jumbo jet", this phrases are similar.