Onerousness and Rigorousness

Onerousness noun - Unwelcome burdensome difficulty.

Rigorousness and onerousness are semantically related. In some cases you can use "Rigorousness" instead a noun "Onerousness".

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

Onerousness and rigorousness are semantically related. Sometimes you can use "Onerousness" instead a noun "Rigorousness".