Charade and Tough nut to crack

Charade noun - A display of emotion or behavior that is insincere or intended to deceive.

Tough nut to crack and charade are semantically related In some cases you can use "Tough nut to crack" instead a noun "Charade".

Charade and tough nut to crack are semantically related in puzzle topic. Sometimes you can use "Charade" instead a noun phrase "Tough nut to crack", if it concerns topics such as mystery, brain-teaser.