Hello! Same here. Mild stutter and a master of synonyms! Do you practice the words you avoided, afterwards? - I DO! I had a BIG problem with a lot of words that begin with an L. (like laser......and such) Through practicing the specific words AND having the courage to use them in public, i really got better! Not completely without stuttering though but i think practicing and having the "guts" to use your "Nemesis" words, definitely helps getting better as a whole. Because often FEAR is the bigger "Nemesis" than the word itself!