From The Collaborative International Dictionary of English v.0.48 [gcide]:
Spelling \Spell"ing\, a.
Of or pertaining to spelling.
[1913 Webster]
Spelling bee, a spelling match. [U.S.]
Spelling book, a book with exercises for teaching children
to spell; a speller.
Spelling match, a contest of skill in spelling words,
between two or more persons.
[1913 Webster]