High-level and Interstate

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

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

Interstate adjective - Involving and relating to the mutual relations of states especially of the United States.

High-level and interstate are semantically related. Sometimes you can use "High-level" instead an adjective "Interstate".