σαββατισμός G4520
sabbatismós · sab-bat-is-mos' · Noun Masculine
from a derivative of σάββατον; a "sabbatism", i.e. (figuratively) the repose of Christianity (as a type of heaven):--rest.
1 Occurrence in the King James Bible
Hebrews 4:9There remaineth therefore a rest to the people of God.