doer

noun

1. a person or thing that does something, especially a person who gets things done with vigor and efficiency.
2. a person characterized by action, as distinguished from one given to contemplation.
3. Australian. an amusing or eccentric person; character.

noun

1. a person or thing that does something or acts in a specified mannera doer of good
2. an active or energetic person
3. a thriving animal, esp a horse