Azahar was looking for words containing each of the vowels aeiou precisely once in order. The full list (from the complete OED) is below. Technically minded folk might also be interested in the appendix at the bottom of this entry.
How many can you get before looking?
With definitions where the word is obscure or obsolete.
abstentious: “Characterized by abstinence”
acheilous: “without a lip”
adventious: “Of the nature of an addition from without; extrinsically added, not essentially inherent; supervenient, accidental, casual.”
affectious, affectiously: “affectionate”
anemious: “Of plants: Windy, i.e. growing in windy and exposed situations.”
annelidous: “Of the nature of an annelid or worm.”
arsenious: “Of the nature of, or containing, arsenic.”
caesious: “Bluish or greyish green. (Chiefly in Bot.)”
camelious: “Jocular word invented by Kipling (in form cameelious) to describe the hump given to the lazy camel in Just So Stories.”
fracedinous: “productive of heat through putrefaction; pertaining to putrid fermentation.”
Gadsprecious: “from Gad, substituted for God: With ordinary ns., sometimes preceded by an adj.; also with the adj. used elliptically, as God’s blest, precious, etc.”
gravedinous: “Drowsy, heavy-headed.”
materious: “Consisting of matter. Also: significant, important; = MATERIAL”
placentious: “Pleasing, or disposed to please; complaisant, agreeable.”
tragedious, tragediously: “Full of, or having the character of, tragedy; calamitous, tragic.”
My dictionary search also picked up these hyphenated words and phrases, but I can’t be bothered to get the definitions for them all.
(my) cake is dough
The regular expression (regex) for finding such words is:
The OED search box doesn’t support full regexs though, so you have to search for *a*e*i*o*u* where the * means any number of any characters. This finds 660 words which you can check by hand or copy into a text editor which supports regexs.
There is also the problem of æ (used in the word cæsious) which you need to check separately.