The term 'sound of alarm' can be represented by two crossword solutions, 'eek' and 'GASP'. 'Eek' is an expression of surprise or fear, usually uttered in a high-pitched voice. It is often used to express shock or fright. 'GASP' is an expression of surprise or shock, usually accompanied by a sudden intake of breath. It is often used to express horror or fear. Both words are commonly used to describe the sound of alarm.