What does "predestinationist" mean?

One who believes in predestination.

What is a synonym for "predestinationist"?

Common synonyms include: determinist, fatalist, predestinarian.

noun

noun ·Rare ·Advanced level

Noun

1
One who believes in predestination.
2
anyone who submits to the belief that they are powerless to change their destiny wordnet

From predestination + -ist.