Spell checkers flag words not found in their dictionaries; they will suggest a replacement for any word they don’t recognize. They can help you spot many errors, but don’t let them be your only proofreader. If you’re writing about the health benefits of a Mediterranean diet, for example, don’t let your software change briam (a vegetable dish) to Brian.

Even if your spell checker identifies a real misspelling, the replacement word it suggests might carry a different connotation or even be nonsensical. After misspelling probably, you might end up with portly. Consider changes carefully before accepting them. If you’re not sure what word or spelling you need, consult a dictionary, such as The Random House College Dictionary or Merriam-Webster online.

Because spell checkers flag only unrecognized words, they won’t catch misused words, such as accept when you mean except. For help with commonly confused or misused words and with avoiding informal speech and jargon, consult the glossary of usage.