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

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adj. Appropriate, suitable, or proper.

adj. Pleasing or attractive to the eye.

v. Present participle of become.

n. The act or process in which something becomes.

adj. pleasingly suitable to the particular person involved.

adj. decent, respectable

adj. Appropriate or fit; congruous; suitable; graceful; befitting.

n. That which is becoming or appropriate.

Fit; suitable; congruous; proper; belonging to the character, or adapted to the circumstances: formerly sometimes followed by of.

Suitable to the appearance or style of; be-fitting esthetically: as, a becoming dress.

n. Something worn as an ornament.

n. That which is suitable, fit, or appropriate.

n. In metaphysics, the transition from non-existence into existence; an intermediate state between being and not being; a state of flux; the state of that which begins to be, but does not endure; change; development: opposed to being.

adj. according with custom or propriety

adj. displaying or setting off to best advantage

"Her smile faded as he left the house, her expression becoming serious with concern."

proper    flattering   

decent    decorous    seemly    proper    comely    congruous    suitable    graceful    befitting   

become   

coming    cumming    drumming    dumbing    forthcoming    humming    numbing    plumbing    strumming    succumbing