savior

Short definition from Wiktionary

Noun

1. 1
   A person who saves someone, rescues another from harm.
2. 2
   A child who is conceived in order to provide an organ or cell transplant to a sibling who has an otherwise fatal disease (used in combination, with "sibling", "baby", "child", "brother", "sister", etc.)

Proper noun

1. 1
   Jesus Christ
2. 2
   A male given name from English.
3. 3
   A female given name from English.