Functionality and Ability

noun

• Capable of serving a purpose well.
  • usage: "software with greater functionality"

(n.) The quality or state of being able; power to perform, whether physical, moral, intellectual, conventional or legal; capacity; skill or competence in doing; sufficiency of strength, skill, resources, etc.; -- in the plural, faculty, talent.

noun

• The quality of being able to perform; a quality that permits or facilitates achievement or accomplishment.
• Possession of the qualities (especially mental qualities) required to do something or get something done.
  • usage: "danger heightened his powers of discrimination"
  • synonyms: power