title: Regex: find from a vast list of words, only whole words
body: <p>I have a very long text, and a long list of words I want to find in this text.</p>
  
  <p>Right now, to search those words, I check "regular expressions" and then find "word1|word2|word3|word4..."
  The problem with this is that if one of the words is "eat," then every word that contains "eat" is also highlighted. How can I prevent that?</p>