Inflexibleness [noun]

● Relentlessness

● Perseverance

● Contumacy

● Intransigence

● Pigheadedness

● Pertinacity

● Inexorableness

● Mulishness

● Obstinacy

● Bullheadedness

● Inexorability

● Rigidness

● Obduracy

● Doggedness

● Intransigency

● Inflexibility

● Grimness

● Rigidity

● Implacability

● Implacableness

● Incompliance

● Incompliancy

● Obdurateness

● Remorselessness

● Indomitability

● Adamancy

● Die-hardism

● Inflexibleness

● Obstination

● Rigidity

● Stubbornness

● Mulishness

● Inveteracy

● Tenacy

● Unelastic

● Obstinacy

● Renitent

● Unyielding

● Unadaptability

● Headstrongness

● Pertinacity

● Renitence

● Reddour

● Intransigence

● Firmness

● Firmity

● Pervicacious

● Indocility

● Obstinate

● Tenacity

● Impliable

● Steadfastness

● Cledgy

● Unpermissiveness

● Obduracy

● Rigidness

● Persistence

● Intransigent

● Implacableness

● Unbendingly

● Unbend

● Impersuadable

● Contrarious

● Doggedness

● Immovableness

● Stiffness

● Unpermissive

● Importunity

● Perseverance

● Overrigid

● Indefatigableness

● Indetermination

● Insistence

● Intransigency

● Toughness

● Torvity

● Firmitude

● Recalcitrance

● Strictness

● Austereness

● Uncompromising

● Recalcitrate

● Subrigid

● Unwavering

● Pliableness

● Calcitrant

● Obdurate

● Invariableness

● Yieldless

● Sedulity

● Adamance

● Unskillfulness

● Irresoluteness

● Hardness

● Reluctation

● Sinewless

● Sternness

● Mansuetude

● Animose

● Dysbulia

● Rigor

● Stolidness

● Indifferency

● Unchangingness

● Resoluteness

● Implacable

● Unsociability

● Constancy

● Unemotionality

● Intractableness

● Stomachy

● Longanimous

● Morbidezza

● Yieldingness

● Unfeelingness

● Unshakable

● Patience

● Inexertion

● Steadiness

● Protervity

● Relentlessness

● Tentiginous

● Obstinance

● Strength

● Flexibility

● Inalterability

● Testif