The term "black look" refers to a facial expression that conveys anger, disapproval, or annoyance. There are several synonyms that can be used to describe this expression, including scowl, glare, frown, grimace, glower, and sneer. A scowl is a facial expression that indicates anger or disapproval, while a glare is a more intense and intimidating look. A frown indicates unhappiness or disapproval, while a grimace is a facial expression that indicates pain or discomfort. A glower is a deep and menacing look, while a sneer conveys contempt or disgust. These synonyms are useful when trying to convey different shades of meaning and emotion in your writing.