Difficulty and Sour note

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

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

Nearby Word: difficult

Difficulty and sour note are semantically related in argument topic. Sometimes you can use "Difficulty" instead a noun phrase "Sour note".