We don't have synonyms for elementalism yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are elementarism, elementalist and elementality.
°A creature (usually a spirit) that is attuned with, or composed of, one of the classical elements: air, earth, fire and water. They sometimes have unique proper names and sometimes are referred to as Air, Earth, Fire, or Water.
°A creature (usually a spirit) that is attuned with, or composed of, one of the classical elements: air, earth, fire and water. They sometimes have unique proper names and sometimes are referred to as Air, Earth, Fire, or Water.