title: Is there a function to recognize a word?
body: <p>Is there a way to evaluate a string and see if it evaluates to a word in English?  Here is what I am looking for </p>
  
  <pre><code>is.word("hello world")
  [1] FALSE
  
  is.word(c("hello", "world")
  [1] TRUE TRUE
  </code></pre>
  
  <p>The above does not work as there is no <code>is.word</code> logical function.</p>