How to stop avoiding feared words?

How to stop avoiding feared words? Ok. So i am a covert stutterer who has been stuttering since when I was a child. I think the primary reason for my stuttering is that some of family members constantly corrected me( even jokingly sometimes) about the way I speak. This inspired a fear in me to speak which remain till this day ( though quite less now). But the most difficult obstacle for me ,as a covert stutterer is that no matter how hard I try, I just can't stop avoiding the words I fear. Like if I block I usually try to say something other than the word I was about to say. This saves me from stuttering but feeds my fear. How can I stop doing this?