Difficulty and Tricky problem

Difficulty noun - Something that is a cause for suffering or special effort especially in the attainment of a goal.

Tricky problem and difficulty are semantically related. In some cases you can use "Tricky problem" instead a noun "Difficulty".

Nearby Word: difficult

Difficulty and tricky problem are semantically related. Sometimes you can use "Difficulty" instead a noun phrase "Tricky problem".