rumour vs rumor

rumour and rumor both are nouns.

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

As nouns, rumour and rumor are synonyms defined as:

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

Other synonyms of rumour include hearsay.

As verbs, rumour and rumor are synonyms defined as:

Other synonyms of rumour include bruit.

rumour (noun)	rumor (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

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