- Action-taker
- Active or energetic person
- Active person
- Activist
- Busy person
- Doer
- Go-getter
- Criminal
- Evil doer
- An evil doer; one who commits a crime; one subject to
public prosecution and punishment; a criminal.
- One who does wrong by injuring another, although not a
criminal.
- Crossword doer
- One who, or that which, solves.