title: Python, match and replace list of strings with dataframe column
body: <p>I have a dataframe column named content, which contains tweets. I have created a list of specific word combination such as </p>
  
  <pre><code>ls=["Apple Watch","Fitbit Device"]
  </code></pre>
  
  <p>I am struggling to write a function that will go through the each item in the list and if any of these items is found in the content tweet column, it will replace the white space in the original "Apple Watch" string with "applewatch", "Fitbit Device" with "fitbitdevice" in the dataframe column(content). </p>
  
  <p>Thank you in advance!</p>