Premature mortality denotes the untimely and early death of an individual before they reach their average life expectancy. To bring a positive and optimistic tone to this concept, antonyms can be used to emphasize life and longevity. Some of these antonyms include mature mortality, long lifespan, extended years, healthy living, prosperous longevity, and fulfilled existence. Each of these words denotes the achievement of living a long, healthy and productive life. The use of these antonyms can provide a sense of hope, motivation, and inspiration to live life to its fullest potential, and take steps towards achieving a long, high-quality life.