High-up and Uppermost

High-up noun - An important or influential (and often overbearing) person.

Uppermost and high-up are semantically related In some cases you can use "Uppermost" instead an adjective phrase "High-up".

Uppermost adjective - Being at a point or level higher than all others.

High-up and uppermost are semantically related in chief topic. Sometimes you can use "High-up" instead an adjective "Uppermost".