Rigorousness and Stumbling block

Rigorousness noun - The quality or state of being demanding or unyielding (as in discipline or criticism).

Stumbling block and rigorousness are semantically related. In some cases you can use "Stumbling block" instead a noun "Rigorousness".

Stumbling block noun - Something that makes movement or progress difficult.

Rigorousness and stumbling block are semantically related. Sometimes you can use "Rigorousness" instead a noun phrase "Stumbling block".