Supereternal

The Absolute is above eternity; it is infinitude. Hence there must be a mediating something between the supereternal and the subeternal.

Source: wiktionary

Nay, even although the world had no beginning, it would not be coeternal with God. For, God is supereternal (superaeternitas); the pure intelligences, including the intellectus agens, are eternal; the heavenly bodies had a beginning, but will have no end; terrestrial substances alone exist in time.

Source: wiktionary

He is the primeval, the eternal, some say the supereternal, and all creatures are merely temporal and passing.

Source: wiktionary