Perl interface to Snowball stemmershttp://search.cpan.org/perldoc?Lingua::Stem::Snowball
Stemming reduces related words to a common root form -- for instance,
"horse", "horses", and "horsing" all become "hors". Most commonly, stemming
is deployed as part of a search application, allowing searches for a given
term to match documents which contain other forms of that term.