* No definitive list: There's no official, universally accepted list of all possible words in the English language. Dictionaries constantly evolve and include new words.
* Variations in language: What's considered a "word" can vary depending on the context (formal vs. informal, slang, etc.).
* Subjectivity of "repeated vowel": Do we consider "aa" in "aardvark" as a repeated vowel? What about "ee" in "tree"? Some might argue these are diphthongs, not repeated vowels.
However, we can say with certainty that there are many words with repeated vowels:
* Common examples: "book," "moon," "food," "street," "cooing," "shooing," "llama," "banana"
* More complex cases: "zoology," "aardvark," "coo-coo," "bee-bee," "skiing"
Ultimately, the number of words with repeated vowels is constantly shifting and depends on how broadly you define the terms.