Rebus and Tough nut to crack

Rebus noun - A puzzle where you decode a message consisting of pictures representing syllables and words.

Tough nut to crack and rebus are semantically related in puzzle topic. In some cases you can use "Tough nut to crack" instead a noun "Rebus", when it comes to topics like mystery, brain-teaser.

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