(n.) Obstinacy; perseverance; persistency\.

application assiduity assiduousness balkiness bigotry bulldog courage bulldog tenacity bullheadedness concentration constancy demandingness determination diligence dogged perseverance doggedness dogmatism endurance engrossment exigency fanaticism fidelity fixed mind fortitude gameness gaminess grittiness hardheadedness hardihood hardiness headstrongness importunacy importunateness importunity indefatigability industriousness industry inflexible will insistence insistency intolerance loyalty mettlesomeness mulishness nerviness obduracy obstinacy obstinateness opinionatedness overzealousness patience patience of Job permanence perseverance persistence persistency pertinaciousness pigheadedness plodding pluckiness plugging preoccupation pressingness pressure relentlessness resoluteness resolution restiveness sedulity sedulousness self-will single-mindedness singleness of purpose slogging spunkiness stability stamina staying power steadfastness steadiness stick-to-itiveness stiff neck stiff-neckedness strongheadness stubbornness sulkiness sullenness tenaciousness tenacity tirelessness uncooperativeness unregenerateness unremittingness unswerving attention urgency willfulness