title: Getting the root word using the Wordnet Lemmatizer
body: <p>I need to find a common root word matched for all related words for a keyword extractor.</p>
  
  <p>How to convert words into the same root using the python nltk lemmatizer? </p>
  
  <ul>
  <li>Eg: 
  
  <ol>
  <li>generalized, generalization -> general </li>
  <li>optimal, optimized -> optimize (maybe) </li>
  <li>configure, configuration, configured -> configure</li>
  </ol></li>
  </ul>
  
  <p>The python nltk lemmatizer gives 'generalize', for 'generalized' and 'generalizing' when part of speech(pos) tag parameter is used but not for 'generalization'.</p>
  
  <p>Is there a way to do this?</p>