I think it’s important for you to understand that the words you struggle with are no different to any other words. You should stop treating them as some tough words. The more you think those are tough words the more tougher it gets and once you start treating them as normal words, your anxiety associated with those words decreases slowly . I found the following post helpful. Plz do give it a read https://www.reddit.com/r/Stutter/comments/qgidt0/long_reading_text_on_how_i_got_fluent_i_tried_to/?utm_source=share&utm_medium=ios_app&utm_name=ioscss&utm_content=2&utm_term=1