Speller (noun)

1. A person who spells words correctly.
2. A person who is good at spelling.

Origin:

From middle english speler, from old english speller, from spellian ("to tell, relate, tell of, speak of.")

Examples:

1. She was the best speller in her grade and won the school spelling bee.
2. The speller was able to spell difficult words like "antidisestablishmentarianism".
3. The speller's ability to spell helped her score high on the spelling portion of her English test.
4. The speller had a good memory for spelling and could spell most words correctly on the first try.
5. The speller's spelling skills helped her to succeed in her writing and editing career.