In an interview, actor Naseeruddin Shah said he suffers from a condition called Onomatomania in which a person fixates on certain words and uses them repeatedly. For example if you are consumed with the word "euphoria" you will tend to use it whenever possible. Onomatomania is an obsession with a particular word.
Dictionary defines it as an abnormal concentration on certain words and their supposed significance or on the effort to recall a particular word.
“I suffer from an ailment called onomatomania. I'm not joking. It's a medical condition. You can check it in the dictionary,” he said in an interview with Chalachitra Talks and went on to explain its meaning. “Onomatomania is an ailment in which you keep repeating a word or a phrase, a sentence or a verse or a speech for no reason at all. Except that you like to hear it. I do it all the time so I am never quite at rest. Even when I am sleeping, I am going over some passages I love," he said in the interview.