Getting the root word using the Wordnet Lemmatizer
<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>