Difference between Rumour and Rumor

Rumour

Part of speech: noun

Definition: A statement or claim of questionable accuracy, from no known reliable source, usually spread by word of mouth.

Rumor

Part of speech: noun

Definition: A statement or claim of questionable accuracy, from no known reliable source, usually spread by word of mouth.Information or misinformation of the kind contained in such claims.

Part of speech: verb

Definition: To tell a rumor about; to gossip.

Example sentence: I'm frustrated by something, it's my fault for exposing myself to it in the first place. The rumor mill always seemed like a grass fire to me. Why walk out in the middle of the field, it's just going to flame out and go away just like everything else does?