The term "evolutionist" refers to someone who believes in the theory of evolution, but there are other words that can also be used to describe a person who holds this belief. Some synonyms for "evolutionist" include: Darwinist (named after Charles Darwin, who first proposed the theory of evolution), naturalist (someone who studies the natural world and its processes), biologist (someone who studies living organisms and their characteristics), and atheist (someone who does not believe in a higher power or deity). However, it's important to note that not all evolutionists are atheists, and not all atheists are evolutionists. The scientific theory of evolution has been widely accepted by the scientific community and is considered to be a fundamental principle in biology.