The term COVERAGE GIANT can be summarized as AETNA, a 5 letter word. AETNA is an American managed health care company, which is the third largest health care insurer in the United States. It provides health insurance services to over 22 million people and is one of the largest providers of traditional and consumer directed health care insurance plans in the United States. AETNA also offers dental, pharmacy, group life, disability, and long-term care insurance and employee benefits.