Strong’s Greek
G605 — apokatastasis
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ἀποκατάστασις
apokatastasis — pronounced ap-ok-at-as'-tas-is
from 600; reconstitution:--restitution. see GREEK for 600
1 occurrence in the KJV.
Acts 3:21
Whom the heaven must receive until the times of restitution of all things, which God hath spoken by the mouth of all his holy prophets since the world began.