aptitude

n. ability, skill

An aptitude is an innate ability to do a certain kind of work. Aptitudes may be physical or mental.
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Noun
1. inherent ability
(antonym) inaptitude
(hypernym) ability, power
(hyponym) instinct, inherent aptitude

n. aptitude, capacity, capability; bent, facility, faculty; fitness, aptness

(n.)
Readiness in learning; docility; aptness.
  

(n.)
A natural or acquired disposition or capacity for a particular purpose, or tendency to a particular action or effect; as, oil has an aptitude to burn.
  

(n.)
A general fitness or suitableness; adaptation.