Here are a few examples:
* "ah": This is a very common vocable used to practice vowel sounds and breath control.
* "oo": This is another common vocable used to practice vowel sounds and resonance.
* "ee": This vocable is used to practice high notes and articulation.
* "ma": This vocable is used to practice lip articulation and vowel sounds.
* "la": This vocable is used to practice soft palate articulation and vowel sounds.
These are just a few examples, and there are many other vocables used in vocal training. The choice of vocable depends on the specific vocal technique being practiced.