noun

an ugly, twisted expression on a person’s face, typically expressing disgust, pain, or wry amusement.

she gave a grimace of pain

scowl,frown,sneer,pout,moue,wince,distorted expression,face,wry face

verb

make a grimace.

I sipped the coffee and grimaced

scowl,frown,sneer,pout,wince,glower,lour,make a face,make faces,pull a face,gurn