Question: which word in english has all vowels?
Answer: Many Vowels Words (found in major English dictionaries) consisting entirely of vowels include AA (a type of lava), AE, AI, AIEEE, IAO, OII, EAU, EUOUAE, OE, OO, I, O, A, IO, and UOIAUAI, the last of these being the longest vowel-only word (seven letters).