Other forms: humanitarians
Despite many jokes to the contrary, a humanitarian is not someone who eats humans (as a vegetarian eats vegetables)! A humanitarian is a person concerned with the welfare of all humankind.
A millionaire would be considered a great humanitarian if he donated much of his wealth for improving education, housing, and food for the poor. As an adjective, humanitarian is used to describe something or someone who displays the characteristics of someone concerned with human welfare: "The humanitarian project was developed to help women become self-sufficient in third world countries."