Pertinacity

Noun

 * 1) The state or characteristic of being pertinacious.
 * 2) *1851, Nathaniel Hawthorne, The House of Seven Gables, ch. 19:
 * Again and again, however, and half a dozen other agains, with the inexorable pertinacity of a child intent upon some object important to itself, did he renew his efforts for admittance.

Adjectives for Pertinacity
savage; playful; relentless; unprecedented; unwavering.

Thesaurus
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

Synonyms

 * pertinaciousness, resolve, stubbornness, tenacity

Anagrams

 * antipyretic