killer

Example:He was always a helper, gladly lending a hand to friends and co-workers.

Definition:A person who is helpful, supportive, or beneficial.

Example:She was a true preserver, focusing on conserving the natural world.

Definition:A person who preserves or maintains something, especially life or the environment.

Example:He was hailed as a savior, saving the electrical grid from complete collapse.

Definition:A person who saves or rescues someone or something; a savior.

Example:The benefactor was praised for their gift to the local hospital.

Definition:A person or organization that gives money, time, energy, or other resources for a charitable purpose.