Angband guide got both variants - armor or armour:
`Armor` is commonly used in USA, while `armour` in England (homeland of Tolkien).
The charts below display the rate of usage of armor vs. armour in English books in the American and British English language communities, respectively:
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`Armor` is commonly used in USA, while `armour` in England (homeland of Tolkien).
The charts below display the rate of usage of armor vs. armour in English books in the American and British English language communities, respectively:

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