speller

noun

1. A person who spells.

   “I'm a slow reader but a good speller.”

   “Without insisting on a difference between the inventors and the spellers of words, Socrates makes short work of this case.”

2. A participant in a spelling bee.
3. (US)A book used to learn how to spell properly.
4. A spell checker.

   “But Word's spelling program still isn't fully integrated into the word processor. For one thing, any changes and corrections you make from the speller's menus don't appear on-screen until you get back to your original file.”

name

1. A surname.