While we have terms like "a flock of birds" or "a herd of elephants," there's no established word for a group of vowels.
However, if you want to be creative, you could use some fun options:
* A chorus of vowels: This highlights the musical quality of vowels.
* A symphony of vowels: Similar to the chorus, this emphasizes the harmonious sounds.
* A quintet of vowels: A more direct approach, using the number of vowels in the English alphabet.
Ultimately, the choice depends on the context and your personal preference!