rigorousness

noun

Etymology: From Middle English rigoresnes, rigoresnesse, rigorousenes, equivalent to rigorous + -ness.

1. The property of being rigorous, strictness.

   “Not the first nor the best and certainly not the most famous dictionary of the English language, Swansby’s has always been a poor shadow of its competitors as a work of reference – from the first printed edition in 1930 to today it has nowhere near the success nor rigorousness of Britannica and the Oxford English Dictionary.”