thrower

Short definition from Wiktionary

Noun

1. 1
   Someone who throws.
2. 2
   Something that throws.
3. 3
   One who throws or twists silk; a throwster.
4. 4
   One who shapes vessels on a throwing engine.
5. 5
   A bowler who illegally throws the ball instead of bowling it.
6. 6
   The pitcher.

Proper noun

1. 1
   A surname.