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

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n. Plural form of tumor.

"The cause of primary brain tumors is unknown, although some tumors such as retinoblastoma tend to be hereditary."

rumor   

Boomers    bloomers    boomers    consumers    groomers    tumors   

rumor    rumour    accusation    gossip    suspicion    speculation    conjecture    possibility    allegation    assertions