Break down and Fall flat

Break down verb - To arrange or assign according to type.

Fall flat and break down are semantically related in fail topic. In some cases you can use "Fall flat" instead a verb "Break down", when it comes to topics like be unsuccessful, fail to attain goal.

Fall flat verb - Fail utterly; collapse.

Break down and fall flat are semantically related in fail topic. You can use "Break down" instead a verb phrase "Fall flat", if it concerns topics such as be unsuccessful, fail to attain goal.