rumor vs rumour

rumor and rumour both are nouns.

Word	Noun	Adjective	Verb	Adverb
rumor	Yes	No	Yes	No
rumour	Yes	No	Yes	No

As nouns, rumor and rumour are synonyms defined as:

rumor and rumour: gossip (usually a mixture of truth and untruth) passed around by word of mouth

Other synonyms of rumor include hearsay.

As verbs, rumor and rumour are synonyms defined as:

Other synonyms of rumor include bruit.

rumor (noun)	rumour (noun)
gossip (usually a mixture of truth and untruth) passed around by word of mouth	gossip (usually a mixture of truth and untruth) passed around by word of mouth

rumor (verb)	rumour (verb)
tell or spread rumors	tell or spread rumors