Severity or strictness. / Harshness, as of climate. / A trembling or shivering response. / Character of being unyielding or inflexible. / Shrewd questioning. / Higher level of difficulty.

plural of rigour

Nonstandard spelling of rigorously.

Misspelling of rigorous. / (rare, archaic) Alternative form of rigorous

Nonstandard spelling of rigorousness.

Alternative form of rigorism

Rare spelling of rigorization.

Rare spelling of rigorize.

plural of rigourism

Misspelling of rigor mortis.