Tenacity
Definition: diligence Synonyms: application, backbone, courage, determination, doggedness, firmness, grit, guts, gutsiness, heart, inflexibility, intestinal fortitude, intransigence, nerve, obduracy, obstinacy, perserverance, persistence, pertinacity, resoluteness, resolution, resolve, spunk, staunchness, steadfastness, stick-to-itiveness, stomach, stubbornness, true grit, willfulness Source: Roget's New Millennium Thesaurus Sign in to see full entry.