Wordnet 3.0
NOUN (1)
1. 
 (Christian theology) the free and unmerited favor or beneficence of God; 
- Example: "God's grace is manifested in the salvation of sinners"- Example: "there but for the grace of God go I"[syn: grace, grace of God, free grace]
WordNet (r) 3.0 (2006):
free grace
    n 1: (Christian theology) the free and unmerited favor or
         beneficence of God; "God's grace is manifested in the
         salvation of sinners"; "there but for the grace of God go
         I" [syn: grace, grace of God, free grace]