* Nouns generally don't end in "y" after a vowel. The "y" acts as a vowel in this case.
* Words ending in "y" after a vowel are usually adjectives (e.g., happy, funny, messy)
Let's look at some examples:
* Monkey: Ends in a consonant ("y" is acting as a consonant)
* Valley: Ends in a consonant ("y" is acting as a consonant)
So, there isn't a common noun that ends in a vowel and "y".