Spell Checkers can highlight words that are not in a dictionary and it can suggest a list of similar words. It has the ability to deal with plurals and verb tenses and most other spell checkers can’t find the words that are used incorrectly in a context.
For an example, “Their coming too sea if its reel” this phrase has five spelling mistakes, if you type this in Gmail editor and check for spelling errors you wont get the error message. but if you will enter this in Google’s search box you will get the ‘Did you mean” message and suggest for “Their coming to see if its real”.
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