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 defect.

"Charlie Crist, who last week defected from the GOP to run as an Independent."

defected    defecting    defectively    defects   

disadvantage   

deficient    deficit    deficiency    defective   

defector    defection   

deficiency    imperfection    blemish    fault    failing    fail    injure    damage   

Brecht    Hecht    Select    affect    bedecked    checked    collect    confect    connect    correct   

deficiency    weakness    fault    flaw    disorder    limitation    failure    injury    difficulty    peculiarity