competence — Competence is the ability to do something well or effectively.
flair — a natural talent, aptitude, or ability; bent; knack: a flair for rhyming.
knack — a special skill, talent, or aptitude: He had a knack for saying the right thing.
proficiency — the state of being proficient; skill; expertness: proficiency in music.
savvy — experienced, knowledgable, and well-informed; shrewd (often used in combination): consumers who are savvy about prices; a tech-savvy entrepreneur.
ability — Your ability to do something is the fact that you can do it.
capability — If you have the capability or the capabilities to do something, you have the ability or the qualities that are necessary to do it.
capacity — The capacity of a container is its volume, or the amount of liquid it can hold, measured in units such as litres or gallons.
cleverness — mentally bright; having sharp or quick intelligence; able.
faculty — an ability, natural or acquired, for a particular kind of action: a faculty for making friends easily.
gift — gamete intrafallopian transfer: a laparoscopic process in which eggs are retrieved from an ovary by aspiration and inserted, along with sperm, into the fallopian tube of another woman.
intelligence — capacity for learning, reasoning, understanding, and similar forms of mental activity; aptitude in grasping truths, relationships, facts, meanings, etc.
smarts — to be a source of sharp, local, and usually superficial pain, as a wound.
stuff — the material of which anything is made: a hard, crystalline stuff.
talent — a special natural ability or aptitude: a talent for drawing.
what it takes — the true nature or identity of something, or the sum of its characteristics: a lecture on the whats and hows of crop rotation.
