title: Regular Expression to exclude a list of words
body: <p>I am requested to enforce a regex behavior that will allow a user to fill a certain field under the following behavior:</p>
  
  <pre><code>^[a-z A-Z0-9\s]+$
  </code></pre>
  
  <p>However, in addition, I have a list of certain words that the user should not be allowed to insert.</p>
  
  <p>I've used the following RegEx:</p>
  
  <pre><code>^((?!WordA|WordB).)[a-z A-Z0-9\s]+$
  </code></pre>
  
  <p>However, this disables any string starting with these words, while I need to disable only strings that are EQUAL to the words.</p>
  
  <p>Any suggestion?</p>