Rewarder
From BiblePortal Wikipedia
Vine's Expository Dictionary of NT Words [1]
1: Μισθαποδότης (Strong'S #3406 — Noun Masculine — misthapodotes — mis-thap-od-ot'-ace )
"one who pays wages" (misthos, "wages," apo, "back," didomi, "to give"), is used by metonymy in Hebrews 11:6 , of God, as the "Rewarder" of those who "seek after Him" (RV). Cp. misthapodosia, "recompence."
King James Dictionary [2]
REWARD'ER, n. One who rewards one that requites or recompenses. Hebrews 11 .
Webster's Dictionary [3]
(n.) One who rewards.