Or you can use the slightly more longwinded form using alternations that allows $w to start with non-work characters (\b looks at the change between \W to \w not \s and \S): 
next if $word =~ /(^|\s)$w(\s|$)/;

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integral, resident of freenode's #perl

In reply to Re: Re: Re: Word Evaluation by integral
in thread Word Evaluation by PerlRookie

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