spellcheck
noun
Definitions
The act of spellchecking.
Example: You'd better run another spellcheck now that you've written that extra chapter.
A spellchecker.
Example: My wordprocessor is supposed to have a spellcheck, but I don't know how to use it.
verb
Definitions
To check that words in written text are properly spelled.
To run a spellchecker on (a document).