What word uses W as a vowel?

This is a bit of a trick question! The letter "W" is typically considered a consonant, not a vowel.

However, there are some cases where "W" can act as a vowel:

* In some dialects: In some dialects of English, "W" can act as a vowel, such as in the word "water" pronounced with a "wah" sound.

* In other languages: In certain languages like Welsh, "W" is a vowel.

* In certain words: There are words like "wow" where "W" is the only vowel sound.

Let me know if you'd like to explore more about how letters can change their roles in different contexts!