performer

1. To begin and carry through to completion; do: The surgeon performed the operation.

2. To take action in accordance with the requirements of; fulfill: perform one's contractual obligations.

3. 1. To enact (a feat or role) before an audience.

   2. To give a public presentation of; present: My theater group performed a three-act play.

1. To carry on; function: a car that performs well on curves.

2. To fulfill an obligation or requirement; accomplish something as promised or expected.

3. To portray a role or demonstrate a skill before an audience: The juggler performed atop a unicycle.

4. To present a dramatic or musical work or other entertainment before an audience.

Synonyms: These verbs signify to carry through to completion. To perform is to carry out an action, undertaking, or procedure, often with great skill or care. The ship's captain performed the wedding ceremony. Laser experiments are performed regularly in the laboratory.
Execute implies performing a task or putting something into effect in accordance with a plan or design: "To execute laws is a royal office; to execute orders is not to be a king" (Edmund Burke).
Accomplish connotes the successful completion of something, often of something that requires tenacity or talent: "Make one brave push and see what can be accomplished in a week" (Robert Louis Stevenson).
To achieve is to accomplish something, often something significant, especially despite difficulty: "Some are born great . . . Some achieve greatness . . . And some have greatness thrust upon them" (Shakespeare).
Effect suggests the power of an agent to bring about a desired result: The prescribed antibiotics didn't effect a complete cure.
To fulfill is to live up to expectations or satisfy demands, wishes, or requirements: All their desires could not be fulfilled.
To discharge an obligation or duty is to perform all the steps necessary for its fulfillment: "I have found it impossible . . . to discharge my duties as King as I would wish to do" (Edward VIII).