What is the longest common word that uses all five vowels only once, and in reverse alphabetical order?

Question

There is a five-letter word containing three consonants and two vowels when, if combined with other words, can form over twenty new legitimate compound words or two-word common phrases.

What is the word?

Answer 1

Uncomplimentary

Answer 2

Might Be EDUCATION.

Comments

where is the reverse order here ??