This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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v. Simple past tense and past participle of neighbor.

"At a huge fire that was a great glow of oak coals old Mammy Kitty, who had superintended Sam's birth and childhood, as well as "neighbored" mine, was gently stirring a mixture that smelled like the kind of breakfast nectar they must have in heaven, while she also balanced a steaming coffee-pot on a pair of crossed green sticks at one corner of the chimney."