Rigorousness and Self-denial

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

Self-denial and rigorousness are semantically related. In some cases you can use "Self-denial" instead a noun "Rigorousness".

Self-denial noun - The act or practice of giving up or rejecting something once enjoyed or desired.

Rigorousness and self-denial are semantically related. Sometimes you can use "Rigorousness" instead a noun phrase "Self-denial".