This is just me. I’m not speaking for the group. 🙏 I can definitely sense when an upcoming word in a sentence will be hard to say, and so, I will purposely move to a word I know that I can pronounce. This often leads to using “lower” vocabulary words because I know that I can say them. If I were you, I would write instances in which a person tries to say a certain word, (whatever that might be) then switches mid-stutter to a different word. This would be something that adds to a sense of realism/accuracy in your prose. I hope that helps. ☺️