When I am in a situation to get words out that start with letters that I struggle with, I usually don't pronounce the letter instead I just say the rest of the word very fast and people just assume that I said it right and they misheard me. Works like a charm. For Example, I struggle with words starting with D, so instead of Deep i just say eep. Since its gonna be a part of some sentence, people will assume i said the word right. This is a temporary fix though. If you really wanna be able to overcome the struggle you gotta practice saying those words. This is what worked for me. I write down the letters I struggle with. I write down a list of words that start with those letters I keep reading the words out loud slowly - 15 minutes a day Then I try reading sentences with those words in it . Again outloud , but slow. - 15 minutes a day This will definitely help you with the stutter.