Synonyms: self-sacrifice, selflessness
Definition: acting with less concern for yourself than for the success of the joint activity
Similar words: cooperation
Definition: joint operation or action
Usage: their cooperation with us was essential for the success of our mission
Synonyms: selflessness, altruism
Definition: the quality of unselfish concern for the welfare of others
Similar words: unselfishness
Definition: the quality of not putting yourself first but being willing to give your time or money or effort etc. for others
Usage: rural people show more devotion and unselfishness than do their urban cousins