aptitude
I
noun
ability, applicability, bent, endowment, faculty, fitness, flair, gift, inclination, innate ability, intelligence, learning, propensity, propriety, suitability, talent, tendency
II
index
ability, caliber (mental capacity), chance (possibility), competence (ability), disposition (inclination), faculty (ability), gift (flair), inclination, instinct, intelligence (intellect), performance (workmanship), potential, predisposition, proclivity, propensity, propriety (appropriateness), qualification (fitness), science (technique), skill, temperament, tendency
Burton's Legal Thesaurus.
William C. Burton.
2006