Antivaxxer is a term used to describe someone who is opposed to vaccination. However, there are a few synonyms that can be used to describe the same belief. One synonym is "vaccine skeptic," which refers to someone who has doubts about the effectiveness or safety of vaccines. Another synonym is "vaccine hesitant," which means someone who is reluctant to receive vaccines due to concerns or fears. "Vaccine objector" is another synonym that can be used to describe someone who refuses vaccinations. Regardless of the term used, it is important to understand the potential risks and benefits of vaccination and make an informed decision.