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

• Lexulous
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n. Plural form of grimace.

v. Third-person singular simple present indicative form of grimace.

"The friend, seeing from this and from certain grimaces of his comrade that he had not kept his word, said to him in great indignation, If you are jealous, my friend, that is a natural thing; but, after the oaths you have sworn to me, I cannot help telling you that I am aggrieved by your having concealed it so long."

grimaced    grimaces    grimacing   

smirk    face    mow    mop    mouth   

grin    shrug    chuckle    grunt    snarl