infallibility (n.)

• absoluteness
• assurance
• assuredness
• certainness
• certainty
• certitude
• chastity
• definiteness
• determinacy
• determinateness
• faultlessness
• finish
• flawlessness
• immaculateness
• impeccability
• ineluctability
• inerrancy
• inevitability
• necessity
• perfection
• positiveness
• predestination
• predetermination
• purity
• sinlessness
• spotlessness
• sureness
• surety
• truth
• unambiguity
• unequivocalness