We don't have synonyms for ishbak yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are ishak.
(N) :
Ishbak (Yīšbāq, "he will leave; leaving"), also spelled JisbakStrong's Exhaustive Concordance of the Bible, Hebrew Dictionary, 3435 and Josabak,Josephus, Flavius, Antiquities, 1.15.1 was, according to the Bible, the fifth son of Abraham and Keturah.
(N) :
Ishbak (Yīšbāq, "he will leave; leaving"), also spelled JisbakStrong's Exhaustive Concordance of the Bible, Hebrew Dictionary, 3435 and Josabak,Josephus, Flavius, Antiquities, 1.15.1 was, according to the Bible, the fifth son of Abraham and Keturah.