High up and High-level

High up adverb - At a great altitude.

High-level and high up are semantically related. in eminent topic. In some cases you can use "High-level" instead an adjective phrase "High up", when it comes to topics like high-ranking.

High-level adjective - At an elevated level in rank or importance.

High up and high-level are semantically related. Sometimes you can use "High up" instead an adjective phrase "High-level".