The term 'sound of dismay' can be expressed in two words: 'eek' and 'GROAN'. 'Eek' is an exclamation of surprise, fear, or alarm, usually uttered in a high-pitched voice. It is often used to express shock or dismay. 'GROAN' is a low, deep sound made in response to pain, disappointment, or frustration. It is often used to express a feeling of despair or hopelessness. Both words are commonly used to express a sound of dismay.