Synonyms of the word

selflessness

• n. The quality or state of being selfless.

altruism

• n. Regard for others, both natural and moral without regard for oneself; devotion to the interests of others;…
• n. (biology, sociobiology) Action or behaviour that benefits another or others at some cost to the performer.

cooperation

• n. (usually uncountable) The act of cooperating.
• n. Active help from a person, organization, etc., such as an orderly sharing of space or resources.
• n. Association for mutual benefit, such as for purposes of production or purchase.

self-sacrifice

• n. The giving up of one's own benefit, especially giving up one's life, for the good of others.

unselfishness

• n. The state of being unselfish.