English Theasurus that shows all the ways the English word is translated from the original Greek and Hebrew.

English Theasurus from the Hebrew and Greek Strong's Dictionary

belief 4102 ** pistis ** assurance, {belief}, believe, faith, fidelity.

unbelief 0543 ** apeitheia ** disobedience, {unbelief}.

unbelief 0570 ** apaistia ** {unbelief}.