“Moldy” or “Mouldy”

Language

Moldy and mouldy are both English terms.

Usage

Moldy is predominantly used in 🇺🇸 American (US) English (en-US) while mouldy 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
moldy	99	26	68	91	83	31	0	32	30	100	100	0
mouldy	1	74	32	9	17	69	0	68	70	0	0	0

• In the United States, there is a preference for "moldy" over "mouldy" (99 to 1).
• In the United Kingdom, there is a 74 to 26 preference for "mouldy" over "moldy".
• In India, there is a preference for "moldy" over "mouldy" (68 to 32).
• In the Philippines, there is a preference for "moldy" over "mouldy" (91 to 9).
• In Canada, there is a preference for "moldy" over "mouldy" (83 to 17).
• In Australia, there is a 69 to 31 preference for "mouldy" over "moldy".
• In Liberia, there is not enough data to determine a preference between "moldy" and "mouldy".
• In Ireland, there is a 68 to 32 preference for "mouldy" over "moldy".
• In New Zealand, there is a 70 to 30 preference for "mouldy" over "moldy".
• In Jamaica, there is a preference for "moldy" over "mouldy" (100 to 0).
• In Trinidad & Tobago, there is a preference for "moldy" over "mouldy" (100 to 0).
• In Guyana, there is not enough data to determine a preference between "moldy" and "mouldy".

Examples

Below, we provide some examples of when to use moldy or mouldy with sample sentences.

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