What is another word for prosocial behavior?

Here are some synonyms for prosocial behavior, depending on the specific nuance you want to convey:

General synonyms:

* Altruistic behavior

* Cooperative behavior

* Helping behavior

* Beneficent behavior

* Empathetic behavior

* Kindness

* Compassion

* Generosity

* Philanthropy (when referring to large-scale actions)

More specific synonyms:

* Volunteerism (for volunteering time or resources)

* Civic engagement (for participating in community activities)

* Social responsibility (for acting in ways that benefit society)

* Social solidarity (for acting in ways that unite people)

The best synonym to use will depend on the specific context of your writing.