Synonyms:
- authenticity,
- authoritativeness,
- calculability,
- deathlessness,
- dependability,
- faithworthiness,
- firmness,
- immortality,
- impenetrability,
- imperishability,
- impregnability,
- incorruptibility,
- indelibility,
- indestructibility,
- indomitability,
- ineffaceability,
- ineradicability,
- inerasableness,
- inexpugnability,
- insuperability,
- inviolability,
- invulnerability,
- irresistibility,
- predictability,
- reliability,
- secureness,
- security,
- solidity,
- soundness,
- stability,
- staunchness,
- steadfastness,
- steadiness,
- substantiality,
- trustworthiness,
- unassailability,
- unattackableness,
- unbeatableness,
- unconquerableness,
- unerringness,
- validity