life-saving

noun

1. a person who rescues another from danger of death, especially from drowning.
2. a person or thing that saves a person, as from a difficult situation or critical moment: That money was a lifesaver.
3. Chiefly British. a lifeguard.

adjective

1. acting to save a person’s life
2. informal giving help in time of need

noun

3. the practice or techniques of saving people’s lives