Crack and First class

Crack adjective - Having or showing exceptional knowledge, experience, or skill in a field of endeavor.

First class and crack are semantically related In some cases you can use "First class" instead an adjective "Crack".

Nearby Words: cracked, cracking, crackle, cracker, crackled

First class noun - Mail that includes letters and postcards and packages sealed against inspection.

Crack and first class are semantically related in excellent topic. Sometimes you can use "Crack" instead an adjective phrase "First class", if it concerns topics such as good, pleasant, best, top.