The phrase "wail of anguish" can be used to describe a mournful cry or scream that expresses extreme sorrow or pain. Synonyms for this phrase might include "sorrowful howl," "agonized yell," or "heartbroken scream." Other related terms might include "mournful keening," "lamenting moan," or "anguish-filled cry." Each of these phrases conveys a similar sense of deep emotional distress and can be used to describe the sounds or expressions of grief or suffering. Whether the anguish is caused by physical pain, loss, or other forms of deep emotional distress, these phrases help to capture the intensity of the moment.