speller
/ˈspelə(r)/noun
with adj.
1- a person who spells with a specified ability拼单词的人：
a very weak speller.
常犯拼写错误的人。
1.1
- chiefly N. Amer. a book for teaching spelling〈主北美〉拼写课本。
1.2
- another term for SPELLCHECKER.