How do you make a word that ends in vowel plural?

You can't make a word that ends in a vowel plural in standard English.

Here's why:

* Plurals in English typically end in "-s" or "-es". This is because the plural marker is added to the singular form of the word.

* Vowel sounds are typically used at the end of singular words. For example, "cat", "dog", "tree".

Examples:

* Singular: cat

* Plural: cats

* Singular: tree

* Plural: trees

Therefore, it's not grammatically possible to have a word that ends in a vowel plural in English.