First-string and High hat

First-string adjective - Of the very best kind.

High hat and first-string are semantically related. In some cases you can use "High hat" instead an adjective phrase "First-string".

High hat noun - A man's hat with a tall crown; usually covered with silk or with beaver fur.

First-string and high hat are semantically related. Sometimes you can use "First-string" instead an adjective phrase "High hat".