“Rigor” or “Rigour”

Language

Rigor and rigour are both English terms.

Usage

Rigor is predominantly used in 🇺🇸 American (US) English (en-US) while rigour is predominantly used in 🇬🇧 British English (used in UK/AU/NZ) (en-GB).

In terms of actual appearance and usage, here's a breakdown by country, with usage level out of 100 (if available) 👇:

Term	US	UK	India	Philippines	Canada	Australia	Liberia	Ireland	New Zealand	Jamaica	Trinidad & Tobago	Guyana
rigor	96	67	81	97	77	64	0	70	68	100	83	100
rigour	4	33	19	3	23	36	0	30	32	0	17	0

• In the United States, there is a preference for "rigor" over "rigour" (96 to 4).
• In the United Kingdom, there is a preference for "rigor" over "rigour" (67 to 33).
• In India, there is a preference for "rigor" over "rigour" (81 to 19).
• In the Philippines, there is a preference for "rigor" over "rigour" (97 to 3).
• In Canada, there is a preference for "rigor" over "rigour" (77 to 23).
• In Australia, there is a preference for "rigor" over "rigour" (64 to 36).
• In Liberia, there is not enough data to determine a preference between "rigor" and "rigour".
• In Ireland, there is a preference for "rigor" over "rigour" (70 to 30).
• In New Zealand, there is a preference for "rigor" over "rigour" (68 to 32).
• In Jamaica, there is a preference for "rigor" over "rigour" (100 to 0).
• In Trinidad & Tobago, there is a preference for "rigor" over "rigour" (83 to 17).
• In Guyana, there is a preference for "rigor" over "rigour" (100 to 0).

Examples

Below, we provide some examples of when to use rigor or rigour with sample sentences.

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