inflexibility (n.)
- certainty
- concentration
- constancy
- fate
- firmness
- fixedness
- fundamentalism
- grimness
- hardness
- immobility
- immobilization
- immovability
- immovableness
- immutability
- inelasticity
- ineluctability
- inertia
- inevitability
- inevitableness
- inexorability
- intractability
- intransigence
- intransigency
- loyalty
- necessity
- obduracy
- obstinacy
- orthodoxy
- predetermination
- purism
- puritanism
- relentlessness
- rigidity
- rigidness
- rigor
- rigorousness
- solidity
- staunchness
- steadfastness
- steadiness
- sternness
- stiffness
- stubbornness
- sureness
- toughness
- trueness
- unalterability
- unchangeability
- unmalleability
- unyieldingness
