persuader

Short definition from Wiktionary

Noun

1. 1
   One who, or that which, persuades, literally or figuratively.
2. 2
   One who, or that which, persuades, literally or figuratively: A hammer; any tool used improvisationally to strike a recalcitrant object.
3. 3
   One who, or that which, persuades, literally or figuratively: A tool used to pack the type into the form.
4. 4
   One who, or that which, persuades, literally or figuratively: An electrode that directs electrons into a multiplier.
5. 5
   One who, or that which, persuades, literally or figuratively: A spur (for riding a horse).