eternalist means one who holds the existence of matter to be from eternity.
Etymology
From eternal + -ist.
noun
- One who holds the existence of matter to be from eternity.“1684-1690, Thomas Burnet, Sacred Theory of the Earth
But if they believe neither paſt nor to come, in a natural ſence, but an unchangeable ſtate of Nature from the Creation to its annihilation, I leave them then to their Fellow Eternaliſts in the Text, […]”
- A believer in eternalism.