title: Tagging a single word with the nltk pos tagger tags each letter instead of the word
body: <p>I'm try to tag a single word with the nltk pos tagger:</p>
  
  <pre><code>word = "going"
  pos = nltk.pos_tag(word)
  print pos
  </code></pre>
  
  <p>But the output is this:</p>
  
  <pre><code>[('g', 'NN'), ('o', 'VBD'), ('i', 'PRP'), ('n', 'VBP'), ('g', 'JJ')]
  </code></pre>
  
  <p>It's tagging each letter rather than just the one word.</p>
  
  <p>What can I do to make it tag the word?</p>