There are numerous synonyms for the phrase "worker for charity," including philanthropist, volunteer, activist, humanitarian, altruist, benefactor, supporter, donor, advocate, and contributor. Philanthropists are individuals who donate their time, money, or resources to charitable causes in order to improve the lives of others. Volunteers are people who freely contribute their time and energy to assist charitable organizations and assist in achieving their objectives. Humanitarians are people who are committed to improving the well-being of others, often by providing aid and support during times of crisis or need. Altruists are individuals who are selfless and motivated by a desire to assist others. Advocates, supporters, donors, and contributors are all individuals who contribute to charitable causes by raising awareness, funding, and providing support to those in need.