In March I wrote a post titled "App Wishlist: Word list Generator". Until "there's an app for that", here is a web version: Word List Generator (part of the Free-Reading project, www.free-reading.net). This engine allows you to generate a word list by selecting various parameters. The ones relevant to us include word length (or number of syllables), CVC form, and initial sounds. I would have liked to also control medial context and specific phoneme parameters, but until there's something better, this can help.
I would use this to create word lists for word-level (obviously) tasks for voice practice, fluency, exercises for coordinating speech and breathing, and especially to practice intelligibility strategies.