Using bool function with parameters

Dear Community,

I'm activating a function BadWordFilter after pressing a Button and I give a parameter which is a string. (First Script)

In the Second Script I'm checking if the player Name contains a bed word and return a bool. Now back in the First Script I would like to ask if the returned bool is true, if it's true then Start a Coroutine and if not then do that what is under else-statement.

Problem is that it says in the if-statement I can't use a == operator. So how do I check propetly the returned bool in the if-statement? I would be happy for any code advices.

Fist Code:

     public void OnButtonClicked()
     {
         string newName = inputName.text.ToLower();
 
         ListAndFilterForBadWords laffbw = new ListAndFilterForBadWords();
         laffbw.BadWordFilter(newName);
 
         if (laffbw.BadWordFilter == true)
         {
             StartCoroutine("SetWarning");
         }
         else
         {
             StartCoroutine("SetPlayerName");
         }
 
         badWordWarning.SetActive(true);
     }

Second Code:

 public bool BadWordFilter (string playersNewName)
     {
         foreach(string word in words)
         {
             if (playersNewName.Contains(word))
             {
                 return true;
             }
         }
 
         return false;
     }