The Collaborative International Dictionary of English v.0.48:
Father-God \Father-God\ n. God, when considered as the first person in the Trinity. Syn: Father. [WordNet 1.5]WordNet (r) 3.0 (2006):
Father-God n 1: God when considered as the first person in the Trinity; "hear our prayers, Heavenly Father" [syn: Father, Father-God, Fatherhood]