“Unauthorized” or “Unauthorised”

Language

Unauthorized and unauthorised are both English terms.

Usage

Unauthorized is predominantly used in 🇺🇸 American (US) English (en-US) while unauthorised 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
unauthorized	98	35	56	97	95	40	0	48	53	100	83	0
unauthorised	2	65	44	3	5	60	0	52	47	0	17	0

• In the United States, there is a preference for "unauthorized" over "unauthorised" (98 to 2).
• In the United Kingdom, there is a 65 to 35 preference for "unauthorised" over "unauthorized".
• In India, there is a preference for "unauthorized" over "unauthorised" (56 to 44).
• In the Philippines, there is a preference for "unauthorized" over "unauthorised" (97 to 3).
• In Canada, there is a preference for "unauthorized" over "unauthorised" (95 to 5).
• In Australia, there is a 60 to 40 preference for "unauthorised" over "unauthorized".
• In Liberia, there is not enough data to determine a preference between "unauthorized" and "unauthorised".
• In Ireland, there is a 52 to 48 preference for "unauthorised" over "unauthorized".
• In New Zealand, there is a preference for "unauthorized" over "unauthorised" (53 to 47).
• In Jamaica, there is a preference for "unauthorized" over "unauthorised" (100 to 0).
• In Trinidad & Tobago, there is a preference for "unauthorized" over "unauthorised" (83 to 17).
• In Guyana, there is not enough data to determine a preference between "unauthorized" and "unauthorised".

Examples

Below, we provide some examples of when to use unauthorized or unauthorised with sample sentences.

Trends

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