Think you need something smarter. How about Yahoo's spell check?

    $ typo onlinetradeing
    $ Corrected: online trading
[download]

Note that you should register with their developer site (it's free) to get your own developer token and use their web API with Yahoo::Search from CPAN and the following script:

    #!/usr/bin/perl
    # typo - Ask Yahoo for spell corrections
    use strict;

    my $term = "@ARGV";

    die "usage: $0 word/phrase ..."
        unless length $term;

    use Yahoo::Search AppId => "your_yahoo_token";

    my($suggestion) = Yahoo::Search->Terms(
        Spell => $term);

    if(defined $suggestion) {
        print "Corrected: $suggestion\n";
    } else {
        print "No suggestions\n";
    }
[download]

Here's an article with more detailed info.