Determine the longest possible word that contains exactly 4 of the vowels in alphabetical order.

*** Archaic/esoteric words are valid. However, slangs, acronyms/abbreviations, hyphenated words like X-ray, A-bomb are NOT permissible.
**** The half-vowel y is not considered as a vowel.
Note: The 4 different vowels are limited to one instance of a given vowel.