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

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v. Present participle of decay.

"He pressed Egyptians to peacefully bring down what he called a decaying regime and threatened"

decayed    decaying    decays   

change integrity    organic phenomenon   

decline    decomposition    decompose    curve of decay   

cadence    chance    case   

decayed    decaying    decayer    particle decay    orbital decay    bacterial decay    decayable    radioactive decay    decayability   

decline    fail    rot    perish    impair    destroy    consumption    corruption    rottenness    deterioration   

A    A.    Bay    Bombay    Bua    Ca    Cabernet    Calais    Cathay    Chevrolet   

corruption    decline    destruction    degradation    sickness    misery    weakness    poverty    disease    failure